How to Grow Torenia (Wishbone Flower): Growth Habits and Planting Methods Explained
Flower name: Torenia
Scientific name: Torenia fournieri
Growth habits of Torenia: Torenia is an annual herb that loves high temperatures and tolerates heat. It likes light and tolerates partial shade, and has no strict requirements for soil. It grows vigorously and does not need much fertilizer; it blooms profusely in sunny, moderately fertile and moist soil.
Planting methods for Torenia: Spring sowing is the main method, while autumn sowing is suitable in South China. The optimum germination temperature is 20 to 30°C, and germination occurs about 10 to 15 days after sowing. The seeds are powdery, so keep them moist when sowing. Transplant when the seedlings are 10 cm tall. Torenia has small flowers, rich colors, a long flowering period and strong vitality; it is suitable for planting on balconies, in flower beds and flower terraces, and is also an excellent hanging-basket flower. It is suitable for flower bed and flower border arrangements, and can also be grown in pots for ornamental viewing.
How to grow Torenia, its habits and cultivation techniques
Torenia (Torenia fournieri Linden. ex Fourn.), the blue pig's ear of the Scrophulariaceae family, is a light-loving plant that tolerates shade but not cold, can self-sow, and prefers well-drained soil.It has the effect of clearing heat and detoxifying.
Morphological characteristics of Torenia
Plant height 15—30 cm, with a neat and compact form. Flowers are axillary or in terminal racemes; flower colors include purple-blue, peach red, orchid purple, deep peach red and purple, among others; seeds are tiny. Square stems, many branches, spreading in form. Leaves are opposite, ovate or ovate-lanceolate, with serrated margins; the petiole is half the length of the leaf; leaves turn red in autumn. Flowers are terminal or axillary on the upper part of the stem (2-3 flowers, not forming an inflorescence), with a labiate corolla and an enlarged calyx; the calyx tube has 5 ridged wings. Flowers are blue, with a variegated corolla (upper lip pale lilac, lower lip violet-purple, throat yellow).
Growth habits of Torenia
It loves high temperatures and tolerates heat. It likes light and tolerates partial shade, and has no strict requirements for soil. It grows vigorously and does not need much fertilizer; it blooms profusely in sunny, moderately fertile and moist soil.
Distribution range of Torenia
Native to tropical Asia and African woodlands.
Ecological environment: grows under forests, in valleys and along roadsides.
Resource distribution: distributed in Zhejiang, Taiwan, China, Guangdong, Guangxi, Guizhou and other places.
Cultivation and propagation methods for Torenia
Seedling propagation techniques
Spring sowing is the main method; autumn sowing is suitable in South China, but protection is needed to overwinter. The seeds are powdery; the optimum germination temperature is 20 to 30°C, and germination occurs about 10 to 15 days after sowing. The growing temperature is 18-21°C, flowering in 12-13 weeks; at 15-30°C, flowering in 13-14 weeks. Keep them moist when sowing.
Because the seeds are tiny, they can be mixed with some fine sand when sowing; after sowing, no soil cover is needed, but plastic film should be used to cover and retain moisture, and water should be applied by the immersion method after sowing. Germination occurs in about 10 days; after emergence, remove the film and place them in a bright, well-ventilated place. During cultivation, place them in a spot with sufficient light; transplant when the seedlings are 10 cm tall. To keep the flower colors vivid, apply organic fertilizer as a base fertilizer before cultivation, and apply chemical or organic fertilizer two to three times during the growing period to maintain soil fertility.
Pot cultivation techniques
Torenia is a subtropical flower that likes a high-temperature growing environment and tolerates high temperatures. Its flowering period is in summer, it can adapt to various soil types, and it needs to be guaranteed sufficient nutrients for growth; when watering in summer, avoid the midday high-temperature period. It does not need much fertilizer; it blooms profusely in sunny, moderately fertile and moist soil.
Summer and autumn are the periods of vigorous growth for Torenia, so when outdoor humidity drops to around 12°C, it can be brought indoors for protective cultivation. The overwintering temperature is best kept above 15°C; frost can destroy it. Torenia likes a humid environment and soil, and must not be allowed to dry out during the growing period. During overwintering, water thoroughly after the surface soil looks dry; for those cared for outdoors in summer, a certain degree of moisture must be maintained, so water frequently and also spray frequently to increase air humidity.
Landscape value of Torenia
Decoration:Torenia has small flowers, rich colors, a long flowering period and strong vitality; it is suitable for planting on balconies, in flower beds and flower terraces, and is also an excellent hanging-basket flower.
Torenia plants are 20-30 cm tall, with opposite, long heart-shaped leaves and finely serrated leaf margins. Flowers are terminal, with a flower shape much like snapdragon; flower colors include white, purplish red or purple-blue, with yellow spots in the throat; the flowering period is extremely long, making it a beautiful herbaceous flower for the period when summer flowers are scarce; its appearance is elegant and gentle, and in the scorching midsummer it can bring us a touch of coolness. It is suitable for flower beds or pots, with a flowering period from summer to autumn; it is especially heat-tolerant and very suitable for cultivation on roofs, balconies and flower terraces; mature seeds that fall to the ground can also sprout, grow and bloom.
How to grow Torenia and when is its flowering period
Torenia has characteristics such as loving high temperatures, tolerating heat and growing vigorously; it is suitable for summer cultivation and can grow well in both shaded and sunny flower beds. Now let's take a specific look at how to grow Torenia.
How to grow Torenia:
1. Management after white emergence
After Torenia is moved onto the greenhouse bench, the greenhouse environment temperature needs to be controlled at 18-20°C. Before the cotyledons unfold, water thoroughly frequently. When fertilizing, apply fertilizer after every other watering, that is, after each watering, wait until the substrate has dried slightly, then fertilize. Alternately apply a water-soluble compound fertilizer with an N-P-K ratio of 14:0:14 and a water-soluble compound fertilizer with an N-P-K ratio of 20:10:20; at this time the fertilizer concentration is 50 PPM. This management should continue until the cotyledons of Torenia unfold. After about 3-5 days, the cotyledons of Torenia are fully unfolded. At this point, management during the plug seedling stage can begin.
2. Plug seedling management
Water
After the second pair of true leaves of Torenia grows out, wet-dry cycling can be carried out. That is, before the substrate is slightly dry but the seedlings have not yet wilted, water the seedlings thoroughly, and repeat this cycle. If the weather is clear, the wet-dry cycle is about watering once every other day; on cloudy or rainy days, the watering interval can be appropriately extended according to the actual condition of the substrate.
Fertilization
The best time to fertilize Torenia is to apply fertilizer after every other watering, that is, after each watering, wait until the substrate has dried slightly, then fertilize. The fertilization method is to alternately apply a water-soluble compound fertilizer with an N-P-K ratio of 14:0:14 and a water-soluble compound fertilizer with an N-P-K ratio of 20:10:20, both at a concentration of 75 PPM. After about 2-3 weeks, Torenia grows its fourth and fifth pairs of true leaves. The roots of the plug seedlings have also filled the plug, and at this point they can be transplanted into pots.
Substrate
The materials needed when preparing the potting substrate for Torenia are garden soil, peat, pine needles and perlite. Mix garden soil, peat, pine needles and perlite in a ratio of 4:3:2:1, and add slow-release fertilizer at a rate of 6 grams per kilogram of substrate; the slow-release fertilizer can continuously release fertilizer with each watering, and its effective period is generally three months. Then add water to moisten the substrate and stir evenly.
Pots
For Torenia seedlings, 13x13 cm pots are generally chosen. After transplanting, no more repotting is done throughout the growing season.
Transplanting
When transplanting, fill the pot fully with substrate. When filling, first use a finger to make a hole in the center of the substrate, then take the Torenia seedling out of the plug tray and place the whole thing into the hole. Torenia is suitable for shallow planting; the optimal planting depth is when the substrate just covers the seedling roots. The filled substrate should remain 1 cm below the pot rim to facilitate future watering. Water thoroughly immediately after transplanting.
3. Management after potting
Water
Because they have just been transplanted into pots, the seedlings need time to adapt to the environment; at this time the substrate should be neither too dry nor too wet. Check frequently and keep the substrate moist. If only a few seedlings are found to have dry substrate, promptly provide targeted supplementary watering. The amount of watering can be determined according to the specific condition of the plants. After about a week, once the seedlings have adapted to the new environment, wet-dry cycling can be carried out. That is, water thoroughly when the substrate is relatively dry but the seedlings have not yet wilted, and repeat this cycle.
Fertilization
Torenia should preferably not be fertilized within one week after potting. Generally, one week after potting, spray a water-soluble compound fertilizer with an N-P-K ratio of 20:10:20 at a concentration of 200 ppm. Because Torenia itself does not like fertilizer, and quick-acting slow-release fertilizer has been added to the potting substrate, after this fertilization, if there are no special circumstances, Torenia no longer needs fertilization.
Pinching
To promote branching, make the mature Torenia full in form and produce more flowers, pinching is needed. The specific operation is to count from the base of the Torenia, keep 2-3 nodes, and pinch off the top growing point above them. Pinching is generally done ten days after potting.
Cultivation techniques for Torenia
Key cultivation points
Torenia is not cold-tolerant; it likes warmth and humidity, likes sunlight, and is not afraid of heat. In cultivation and management, it does not have high requirements for environmental conditions, but setting up protective measures during seedling raising is more beneficial. It has strong adaptability to soil, but neutral or slightly alkaline loam that is moist and well-drained is best. When 3-4 pairs of true leaves appear on Torenia, transplanting or potting should be carried out. At this time, combine with pinching to encourage lateral branches to sprout from the leaf axils. Throughout the entire growth process, pinch frequently to promote more branching and more flowering.
Although Torenia is not afraid of heat, a little shading during the hottest days is still necessary. In practice we can clearly see that with a little shading, it keeps green branches and leaves and blooms freely; without shading, although flowering is not affected, the leaves appear yellow-green; if it is too shady, it will grow leggy and delay flowering.
During cultivation, place it in a spot with sufficient light. To keep the flower colors vivid, apply organic fertilizer as a base fertilizer before cultivation, and apply chemical or organic fertilizer two to three times during the growing period to maintain soil fertility. During cultivation, do not water too much, and do not fertilize excessively; generally, applying a thin fertilizer as a top dressing every 10-15 days is sufficient. It grows vigorously and does not need much fertilizer; it blooms profusely in sunny, moderately fertile and moist soil.
Key planting points
Spring sowing is the main method; autumn sowing is suitable in South China. The optimum germination temperature is 20 to 30°C, and germination occurs about 10 to 15 days after sowing. The seeds are powdery, so keep them moist when sowing. Transplant when the seedlings are 10 cm tall.
Sunlight
It is a sun-loving plant and needs sufficient sunlight.
Management
Fertile loam or sandy loam is best; drainage and sunlight need to be good. It likes warmth by nature, and the suitable growing temperature is about 15-30°C.
Water
Although Torenia is drought-tolerant, the soil needs to be kept moist often to help growth.
Fertilization
If growth is good, fertilization is unnecessary, but if growth is poor, various organic fertilizers or the three major elements can be used, with top dressing 1-2 times per month.
Propagation
By sowing, possible throughout the year, especially best in spring.
If sown in autumn or winter, keep warm to overwinter. Torenia has pale green leaves and a light, graceful and delicate flower posture; it has a brilliant and flourishing life, blooming in the season fullest of sunlight, like a spirit of life galloping, leaping and flying, interpreting the splendor and brilliance of life.
Introduction to Torenia:
Torenia is the whole plant of the Scrophulariaceae plant Torenia concolor; it is a light-loving plant that tolerates shade but not cold, can self-sow, and prefers well-drained soil. It has the effect of clearing heat and detoxifying.
Torenia is native to the Indochinese Peninsula. Plant height 15—30 cm, with a neat and compact form. Flowers are axillary or in terminal racemes; flower colors include purple-blue, peach red, orchid purple, deep peach red and purple, among others; the flowering period is July—October; seeds are tiny.
Torenia likes sunlight. It has strong adaptability to soil, but moist and well-drained loam is best; it is not cold-tolerant and is relatively heat-tolerant.
Torenia has small flowers, rich colors, a long flowering period and strong vitality; it is suitable for planting on balconies, in flower beds and flower terraces, and is also an excellent hanging-basket flower.
Torenia plants are 20 to 30 cm tall, with a flowering period from June to September; flower colors include blue-purple and pink, among others. The leaves are pale green, and the flower posture is light and graceful; it is a beautiful herbaceous flower for when summer flowers are scarce.
The entire stem and leaves of Torenia are hairless; the stem is four-angled, and the leaves are opposite on it, ovate with pointed tips and serrated margins. Flowers emerge opposite from the leaf axils, and some are borne at the top of the stem; small purple flowers bloom in summer, at first glance resembling violets. The labiate flower is composed of two pale purple petals on the upper side and three deep purple petals on the lower side, with a prominent yellow rose in the center of the tube.
Torenia is generally sown in spring. Because the seeds are tiny, they can be mixed with some fine sand when sowing; after sowing, no soil cover is needed, but plastic film should be used to cover and retain moisture, and water should be applied by the immersion method after sowing. Germination occurs in about 10 days; after emergence, remove the film and place them in a bright, well-ventilated place; when 5 true leaves have formed or the plant height has reached 10 cm, they can be transplanted. During cultivation, place them in a spot with sufficient light. To keep the flower colors vivid, apply organic fertilizer as a base fertilizer before cultivation, and apply chemical or organic fertilizer two to three times during the growing period to maintain soil fertility.
Morphological characteristics of Torenia
Torenia is an annual herb, about 15-25 cm tall, with smooth stems, opposite leaves that are long heart-shaped with serrated margins; the leaves turn red in autumn; flowers grow at the top of the plant, and the flower shape resembles the mouth of a little goldfish, very cute.
There are also many flower colors: white, light purple-pink, peach red and deep purple are all available.
The plant has very strong heat tolerance and a large flower quantity; the flowers are lively and cute. It is a flower bed flower whose usage in gardens is currently gradually increasing; its continuous flowering habit and strong heat tolerance make Torenia an important decorative flower bed flower for the hot summer.
Torenia plants are 15—30 cm tall, with a neat and compact form. Torenia has square stems and many branches, spreading in form.
Leaves are opposite, ovate or ovate-lanceolate, with serrated margins; the petiole is half the length of the leaf; leaves turn red in autumn. Flowers are terminal or axillary on the upper part of the stem (2-3 flowers, not forming an inflorescence), with a labiate corolla and an enlarged calyx; the calyx tube has 5 ridged wings.
Flowers are blue, with a variegated corolla (upper lip pale lilac, lower lip violet-purple, throat yellow.
Flowers are axillary or in terminal racemes; flower colors include purple-blue, peach red, orchid purple, deep peach red and purple, among others; seeds are tiny. Square stems, many branches, spreading in form. Leaves are opposite, ovate or ovate-lanceolate, with serrated margins; the petiole is half the length of the leaf; leaves turn red in autumn.
Flowers are terminal or axillary on the upper part of the stem (2-3 flowers, not forming an inflorescence), with a labiate corolla and an enlarged calyx; the calyx tube has 5 ridged wings. Flowers are blue, with a variegated corolla (upper lip pale lilac, lower lip violet-purple, throat yellow.) The flowering period is July—October.
Ecological habits of Torenia
Torenia loves high temperatures and tolerates heat. It likes light and tolerates partial shade, and has no strict requirements for soil. It grows vigorously and does not need much fertilizer; it blooms profusely in sunny, moderately fertile and moist soil.
It likes light, tolerates shade, is not cold-tolerant, can self-sow, and prefers well-drained soil.
Torenia plants are 20-30 cm tall, with opposite, long heart-shaped leaves and finely serrated leaf margins. Flowers are terminal, with a flower shape much like snapdragon; flower colors include white, purplish red or purple-blue, with yellow spots in the throat; the flowering period is extremely long, making it a beautiful herbaceous flower for the period when summer flowers are scarce; its appearance is elegant and gentle, and in the scorching midsummer it can bring us a touch of coolness. It is suitable for flower beds or pots, with a flowering period from summer to autumn; it is especially heat-tolerant and very suitable for cultivation on roofs, balconies and flower terraces; mature seeds that fall to the ground can also sprout, grow and bloom.