What are the precautions for growing Pentas lanceolata from seed?
Pentas lanceolata comes in a very wide range of colors and varieties. Because its flowers split into five lobes forming a five-pointed star shape, it is also known as the star flower. Pentas lanceolata has a long blooming period and is very suitable for potted plants and flower bed landscaping. Artificial propagation of Pentas lanceolata generally uses the seed-sowing method.
Pentas lanceolata comes in a very wide range of colors and varieties. Because its flowers split into five lobes forming a five-pointed star shape, it is also known as the star flower. Pentas lanceolata has a long blooming period and is very suitable for potted plants and flower bed landscaping. Artificial propagation of Pentas lanceolata generally uses the seed-sowing method. Here is a brief introduction to the precautions for growing Pentas lanceolata from seed; friends who like it can learn about it together.
Pentas lanceolata
During the seedling stage of Pentas lanceolata, because the seeds are tiny, plug seedlings are usually raised for sowing. The common sowing medium is a sterile medium rich in humus with good drainage, with a pH of 6.5-6.8 and an EC value of 0.75 ms/cm. Sow in plug trays, 1 seed per cell. The cell hole size should preferably be 1.5-2 cm. Germination begins about 10-14 days after sowing; the optimum temperature is 23-26°C. The seeds need light to germinate, so do not cover them. During germination, water thoroughly to speed up the dissolution of the outer layer of the pink flower and promote germination.
7-9 weeks after sowing, they can be transplanted into pots, with a pot diameter of 10-15 cm being suitable. Use a sterile peat soil that contains a little fertilizer and has good drainage as the growing medium. A pH of 6.5-6.8 is suitable. Warmth and sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
Pentas lanceolata prefers an environment with sufficient sunlight. Strong light can improve plant quality; the stronger the light, the more compact the plant. When growing in winter, attention should be paid to supplementary lighting. During the growing period, the relative humidity in the air should be low, which can reduce leaf diseases. Pentas lanceolata should not be overwatered; keeping the growing medium slightly dry can promote flower bud differentiation and growth.
How to propagate Pentas lanceolata, and the seed sowing method for Pentas lanceolata
How to sow Pentas lanceolata 1. Preparation before sowingFirst, prepare the seeds of Pentas lanceolata, and also prepare a plug tray as the seedling-raising facility.
The sowing soil is generally a humus-rich, well-drained, sterile soil with a clay content of 10%-20%. Coconut fiber, perlite and other materials can be appropriately added to the soil.
2. Steps for sowing the seedsFirst, sow the Pentas lanceolata seeds one by one in the plug tray. Remember to sow 1 seed per cell, and the cell hole size should preferably be 1.5-2 cm.
Generally, about 10-14 days after sowing Pentas lanceolata, the seeds will germinate. The germination temperature should be controlled at 23°C-26°C, and the relative humidity in the air should be kept at 100% until the leaves of Pentas lanceolata grow out.
During germination, the Pentas lanceolata seeds should be kept sufficiently moist. In addition, this can help dissolve the outer layer of the flower and promote seed germination.
7-9 weeks after sowing the Pentas lanceolata seeds, growers can transplant Pentas lanceolata into pots. The pot diameter is best 10-15 cm. Choose a sterile peat soil that contains a little fertilizer and has good drainage as the growing substrate, with a pH of 6.5-6.8 being suitable.
3. Precautions for sowinga. Before sowing Pentas lanceolata seeds, apply 1-2 kg each of complete balanced fertilizer and slow-release fertilizer per cubic meter in the substrate to keep the sowing soil fertile. In short, provide the seeds with sufficient nutrients.
b. During the plug seedling growth stage, the relative humidity should be reduced to 50% to prevent leaf diseases.
c. During germination, if the light intensity is kept stable at 1000 lux, the new shoots will grow more uniformly and with higher quality. After germination, maintain the light intensity at 10,000-25,000 lux. As the seedlings grow, the light intensity must be increased to 50,000 lux, and the temperature should be controlled.
d. After germination, let the seedlings receive sunlight as soon as possible to avoid leggy growth and promote rapid plant growth.
Pentas lanceolata Pentas Lanceolata Pentas lanceolata illustrated guide: how to grow Pentas lanceolata / how to propagate Pentas lanceolata
Pentas lanceolata profilePentas lanceolata Pentas Lanceolata
How to grow Pentas lanceolata and precautions, an introduction to Pentas lanceolata
Pentas lanceolata (scientific name: Pentas Lanceolata) is native to tropical Africa or cultivated plantings. It is a perennial herbaceous flower with a perennial root system. It is drought-tolerant and heat-tolerant, with a long blooming period. Its flower colors include pink, scarlet, peach red, white and others. The blooming period is mainly concentrated from March to October. It is suitable for potted plants and for arranging flower stands, flower beds and landscapes.
Pentas lanceolata is a perennial herbaceous flower of the Rubiaceae family with a perennial root system. It generally grows 30 cm to 40 cm tall, with upright stems and strong branching. Its leaves are opposite, lanceolate, with acuminate tips, 6 cm to 8 cm long. It has terminal cyme inflorescences, and the small flowers are tubular. The flower color splits into five lobes forming a five-pointed star shape, hence the name star flower. Dozens of star flowers cluster into balls, very gorgeous and pleasing to the eye. It is native to tropical Africa or cultivated plantings. It is a perennial herbaceous flower with a perennial root system, drought-tolerant and heat-tolerant, with a long blooming period. Its flower colors include pink, scarlet, peach red, white and others. The blooming period is mainly concentrated from March to October. It is suitable for potted plants and for arranging flower stands, flower beds and landscapes.
Morphological characteristics of Pentas lanceolata
Features: The small flowers are tubular, and the corolla splits into five lobes in a star shape, hence the name.
Branches: The branches are greenish brown with fine white down. It is robust and has good drought tolerance.
Stem: Upright, green, brown near the root, with white down on the branches.
Leaves: Simple leaves, opposite, long lanceolate, entire, papery, with petioles, green, with obvious sunken marks on the leaf surface, rough, pinnate veins.
Flowers: Cyme inflorescences, terminal on the stem, small flowers star-shaped, tubular, composed of a dozen or more star-shaped small flowers forming clusters of flower balls.
Pentas lanceolata
Pentas lanceolata
Flower colors: red, purple, pink, white and others.
Blooming period: spring and autumn.
Fruit: Capsule membranous, seeds tiny, about 35,000 seeds/gram.
Pentas lanceolata generally grows 30-40 cm tall, with upright stems and strong branching. Its leaves are opposite, lanceolate, with acuminate tips, 6-8 cm long. It has terminal cyme inflorescences, and the small flowers are tubular. The flower color splits into five lobes forming a five-pointed star shape, hence the name Pentas lanceolata.
Dozens of star flowers cluster into balls, very gorgeous and pleasing to the eye. It is a perennial herbaceous flower with a perennial root system and a long blooming period. Its flower colors include pink, scarlet, peach red, white and others. The blooming period is mainly concentrated from March to October.
Ecological habits of Pentas lanceolata
It likes high temperatures, with an optimum growing temperature of 25-30°C. It is suitable for cultivation in sandy soil rich in organic matter, and drainage must be good. It develops well in both full sun and partial sun.
Warmth and sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
During the seedling stage of Pentas lanceolata, because the seeds are tiny, plug seedlings are usually raised for sowing. The common sowing medium is a sterile medium rich in humus with good drainage, with a pH of 6.5-6.8 and an EC value of 0.75 ms/cm. Sow in plug trays, 1 seed per cell. The cell hole size should preferably be 1.5-2 cm. Germination begins about 10-14 days after sowing; the optimum temperature is 23-26°C. The seeds need light to germinate, so do not cover them. During germination, water thoroughly to speed up the dissolution of the outer layer of the pink flower and promote germination.
Pentas lanceolata likes strong light. After germination, let the seedlings receive sunlight as soon as possible to avoid leggy growth and promote rapid plant growth.
7-9 weeks after sowing, they can be transplanted into pots, with a pot diameter of 10-15 cm being suitable. Before potting, fertilize moderately so that the plants grow strong and to reduce the shock that potting causes to the plants. Use a sterile peat soil that contains a little fertilizer and has good drainage as the growing medium. A pH of 6.5-6.8 is suitable. Warmth and sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
Cultivation techniques for Pentas lanceolata
1. Transplanting
7-9 weeks after sowing, they can be transplanted into pots, with a pot diameter of 10-15 cm being suitable. A 10 cm pot can hold 1 seedling, and a 15 cm pot can hold 1-2 seedlings. Before potting, fertilize moderately so that the plants grow strong and to reduce the shock that potting causes to the plants.
2. Growing medium
Use a sterile peat soil that contains a little fertilizer and has good drainage. A pH of 6.5-6.8 is suitable to avoid iron toxicity and magnesium deficiency. If the pH is below 6.0, severe leaf edge scorching will occur due to iron toxicity, and the plants will stop growing.
3. Temperature
Warmth and sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
4. Light
Pentas lanceolata prefers an environment with sufficient sunlight. The stronger the light, the more compact and sturdy the plant. Therefore, in winter with weak light and short days, attention should be paid to supplementary lighting.
5. Water
Pentas lanceolata is relatively drought-tolerant but not waterlogging-tolerant. During the growing period, do not overwater, and at the same time avoid water accumulating in the growing medium, so as to avoid inducing root rot. When watering, the water temperature should not be too low (that is, the water temperature should be consistent with the medium temperature). Overwatering often makes the plants yellow and slows flower growth.
6. Fertilization
One week after planting, start applying "Leaf Green Essence" at 800-**** times dilution, once every 7-10 days. When the plants enter the mid-growth stage (that is, 8-10 cm tall), switch to applying "Bloom Essence" at 800-**** times solution, once a week, to promote flower bud differentiation and good growth.
7. Other
(1) After planting, when the plants have 3-4 pairs of true leaves, pinch once to make the branching neat and the flowering uniform.
(2) Generally, pinching once is enough. If the flowering period is expected to be too early, pinch twice. Each pinching will delay flowering by 10-12 days.
(3) Cultivation time: 110-120 days for a 10 cm pot; 120-140 days for a 15 cm pot.
During the seedling stage of Pentas lanceolata, because the seeds are tiny, plug seedlings are usually raised for sowing. The common sowing medium is a sterile medium rich in humus with good drainage, with a pH of 6.5-6.8 and an EC value of 0.75 ms/cm. Sow in plug trays, 1 seed per cell. The cell hole size should preferably be 1.5-2 cm. Germination begins about 10-14 days after sowing; the optimum temperature is 23-26°C. The seeds need light to germinate, so do not cover them. During germination, water thoroughly to speed up the dissolution of the outer layer of the pink flower and promote germination.
7-9 weeks after sowing, they can be transplanted into pots, with a pot diameter of 10-15 cm being suitable. Use a sterile peat soil that contains a little fertilizer and has good drainage as the growing medium. A pH of 6.5-6.8 is suitable. Warmth and sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
Pentas lanceolata prefers an environment with sufficient sunlight. Strong light can improve plant quality; the stronger the light, the more compact the plant. When growing in winter, attention should be paid to supplementary lighting.
During the growing period, the relative humidity in the air should be low, which can reduce leaf diseases. Pentas lanceolata should not be overwatered; keeping the growing medium slightly dry can promote flower bud differentiation and growth.
For fertilizing Pentas lanceolata, "Leaf Green Essence" 800-**** times aqueous solution is often applied once every 7-10 days to promote leaf expansion. After the mid-growth stage, apply "Bloom Essence" 800-**** times aqueous solution with a 15-30-15 (N:P:K) formula once every 7-10 days to promote flower bud differentiation and growth. Topdressing is needed during the blooming period. After the flowers fade, cut off the spent flowers, and new shoots can sprout and bloom again. In East China, cultivation requires overwintering in a greenhouse.
The main diseases and pests of Pentas lanceolata are gray leaf spot, red spider mites, whiteflies and aphids. Prevention methods include keeping the cultivation site clean and using sterile soil, growing media and pots.
(1) After planting, when the plants have 3-4 pairs of true leaves, pinch once to make the branching neat and the flowering uniform.
(2) Generally, pinching once is enough. If the flowering period is expected to be too early, pinch twice. Each pinching will delay flowering by 10-12 days.
(3) Cultivation time: 110-120 days for a 10 cm pot; 120-140 days for a 15 cm pot.
Pentas lanceolata prefers an environment with sufficient sunlight. Strong light can improve plant quality; the stronger the light, the more compact the plant. When growing in winter, attention should be paid to supplementary lighting.
During the growing period, the relative humidity in the air should be low, which can reduce leaf diseases. Pentas lanceolata should not be overwatered; keeping the growing medium slightly dry can promote flower bud differentiation and growth.
For fertilizing Pentas lanceolata, "Leaf Green Essence" 800-**** times aqueous solution is often applied once every 7-10 days to promote leaf expansion. After the mid-growth stage, apply "Bloom Essence" 800-**** times aqueous solution with a 15-30-15 (N:P:K) formula once every 7-10 days to promote flower bud differentiation and growth. Topdressing is needed during the blooming period. After the flowers fade, cut off the spent flowers, and new shoots can sprout and bloom again. In East China, cultivation requires overwintering in a greenhouse.
How to grow Pentas lanceolata: sowing conditions
① Seedling facility: plug tray.
② Medium: Use a humus-rich, well-drained, sterile seedling medium such as Nongyou Seedling Company's "Strong Seedling No. 3".
③ pH value: 6.5-6.8.
④ EC value: 0.75 ms/cm.
⑤ Light: The seeds need light to germinate, so do not cover with soil. During germination, a light intensity of 1000 lux can make germination uniform and improve seedling quality. Pentas lanceolata likes strong light. After germination, let the seedlings receive sunlight as soon as possible to avoid leggy growth and promote rapid plant growth. After germination, maintain the light intensity at 10,000-25,000 lux. As the seedlings grow, the light intensity must be increased to 50,000 lux, and the temperature should be controlled.
⑥ Temperature: The optimum germination temperature is 20-30°C.
⑦ Humidity: Keep the relative humidity in the air at 100% until the cotyledons emerge, and avoid making the seedling medium too wet. During the plug seedling growth stage, it is advisable to reduce the relative humidity to 50% to prevent leaf diseases.
Sow one by one in plug trays or drill in seedling trays.
Water
Pentas lanceolata seedlings grow well in a moist environment, so during the seedling stage keep the medium moist as much as possible. The whole Pentas lanceolata plant is covered with hairs, so to avoid keeping the plants in a high-humidity state due to spraying, water is mostly supplied by the bottom-watering method during the seedling stage. The suitable relative air humidity is 50%. Water management follows the principle of watering when dry and withholding when wet, but it should not be too dry. After the radicle emerges, apply "Leaf Green Essence" 3000 times aqueous solution with a 15-10-15 (N:P:K) formula as soon as possible, once a week. After the cotyledons unfold, the concentration can be increased to 2000 times. The suitable temperature for the seedling stage (the 4th-5th week after sowing) is 17-20°C. The fertilization concentration is 1000-1500 times, once a week, to make the seedlings grow rapidly. Be careful to keep the EC value between 1.0-1.5 ms/cm. If the pH of the growing soil is below 6.0, the plants will suffer severe iron toxicity, and growth will slow or stop. Regular application of calcium nitrate can prevent the pH from decreasing.
Propagation methods for Pentas lanceolata
It can be done by sowing or cuttings, and can be carried out all year round, with spring and autumn being the best.
Propagation is mainly by cuttings. For growth and flowering, full sun or partial sun is best. In shaded places, the branches tend to become leggy and flowering is poor. Drainage must be good; if the soil accumulates water, the roots easily rot.
During the seedling stage of Pentas lanceolata, because the seeds are tiny, plug seedlings are usually raised for sowing. The common sowing medium is a sterile medium rich in humus with good drainage, with a pH of 6.5-6.8 and an EC value of 0.75 ms/cm. Sow in plug trays, 1 seed per cell. The cell hole size should preferably be 1.5-2 cm. Germination begins about 10-14 days after sowing; the optimum temperature is 23-26°C. The seeds need light to germinate, so do not cover them. During germination, water thoroughly to speed up the dissolution of the outer layer of the pink flower and promote germination.
1. Pentas lanceolata likes strong light. After germination, let the seedlings receive sunlight as soon as possible to avoid leggy growth and promote rapid plant growth. 7-9 weeks after sowing, they can be transplanted into pots, with a pot diameter of 10-15 cm being suitable. Before potting, fertilize moderately so that the plants grow strong and to reduce the shock that potting causes to the plants. Use a sterile peat soil that contains a little fertilizer and has good drainage as the growing medium. A pH of 6.5-6.8 is suitable. Warmth and
sufficient sunlight help the growth of Pentas lanceolata. During the growing period, keep the night temperature above 17-18°C and the day temperature above 22-24°C. Temperatures below 10°C will make flowering uneven and delay or hinder the opening of the flowers.
2. Pentas lanceolata prefers an environment with sufficient sunlight. Strong light can improve plant quality; the stronger the light, the more compact the plant. When growing in winter, attention should be paid to supplementary lighting.
During the growing period, the relative humidity in the air should be low, which can reduce leaf diseases. Pentas lanceolata should not be overwatered; keeping the growing medium slightly dry can promote flower bud differentiation and growth.
3. For fertilizing Pentas lanceolata, "Leaf Green Essence" 800-**** times aqueous solution is often applied once every 7-10 days to promote leaf expansion. After the mid-growth stage, apply "Bloom Essence" 800-**** times aqueous solution with a 15-30-15 (N:P:K) formula once every 7-10 days to promote flower bud differentiation and growth. Topdressing is needed during the blooming period. After the flowers fade, cut off the spent flowers, and new shoots can sprout and bloom again. In East China, cultivation requires overwintering in a greenhouse.
Disease control of Pentas lanceolata
The main diseases and pests of Pentas lanceolata are gray leaf spot, red spider mites, gray mold, whiteflies and aphids. Prevention methods include keeping the cultivation site clean and using sterile soil, growing media and pots.
Symptoms of whiteflies and gray mold and their control:
1. Whiteflies
Symptoms: The leaves of the young tender parts of the plant fade green and turn yellow, and eventually the whole plant wilts and dies.
Control:
(1) Use "insect-proof netting" to block the invasion of external pests.
(2) Before cultivation, thoroughly fumigate the cultivation site and clear weeds.
(3) Spray the whole plant with 2.5% Kung Fu 2500-3000 times solution or 20% Mieshaoli 2500 times solution.
2. Gray mold
Symptoms: Mostly caused by excessive moisture in the rainy season or by overwatering. At first, water-soaked brown spots appear on the stems and leaf edges, gradually spreading until branches and leaves rot. When the air humidity is relatively high, gray mold often appears on the diseased parts.
Control:
(1) Keep the growing medium in a semi-dry state, do not overwater, and strengthen ventilation at the cultivation site.
(2) Thoroughly disinfect the growing medium.
(3) Before cultivation, disinfect the site with chlorothalonil smoke agent at a dose of 200 g/mu. After cultivation, it must be continued, once every 10 days.
(4) When disease occurs, spray the whole plant with 50% iprodione 1500 times solution or spray the whole plant with ridomil 2000 times solution.
Distribution area of Pentas lanceolata
Pentas lanceolata is native to tropical Africa, Madagascar, Arabia and other places, and is now cultivated in various places.
Pentas lanceolata is robust by nature, prefers cool and dry conditions, is drought-tolerant and heat-tolerant, with an optimum temperature of 20-30°C. It is suitable for cultivation in sandy soil rich in organic matter, and drainage must be good. It develops well in full sun and partial sun. It is slightly tolerant of partial shade and requires more than 4 hours of full sun per day. The seeds germinate in response to light. In overly shaded places, the branches will become leggy and flowering will be poor. After sowing, the medium may be left uncovered, but the medium and air must be kept moist. The suitable germination temperature is 20-26°C. The plant has a wide temperature range for growth and can grow at 10-30°C, but grows better at 18-30°C. It takes 120 days from sowing to flowering. After the seedlings are planted and established, pinching is needed to encourage more side shoots and more flowers. After the flowers fade, the spent flowers can be removed and fertilizer applied to encourage more new shoots and continued blooming.
Variety classification of Pentas lanceolata
The "New Look" series is the first seed-propagated Pentas lanceolata series for pot flowers. The plant height is 20-25 cm, with good branching and a compact plant shape. The umbel-like inflorescences are full of star-shaped small flowers, refreshing to the eye. It is quite heat-tolerant and drought-tolerant, widely used for pot flowers, and also suitable for flower beds, balconies and landscape arrangements. The flower colors are pink, purple-red, red and white. It takes about 4 months from sowing to flowering.
The "Madame Butterfly" series is robust in growth and highly adaptable. The plant height is 30 cm, and in the high-temperature season it can grow to 50 cm. Large flowers, many flowers, and the cyme inflorescences can reach 7-10 cm in diameter. It has flower colors such as red, bright pink, cherry red, deep peach and light purple.
Uses of Pentas lanceolata
1. It is a nectar source plant and can attract butterflies.
2. It is often used for potted plant beautification, courtyard landscaping and flower bed arrangement. It can also be used as cut flowers for flower arranging materials.
Landscape Uses of Star Cluster (Pentas)
Suitable for container growing and for arranging flower platforms, flower beds and landscape displays.
Star Cluster (Pentas) Pictures