Moss Rose (Portulaca grandiflora) Cultivation Methods, Precautions, Flowering Time and Symbolism

Moss rose, also known as pine-leaf peony or purslane, is a perennial flower of the genus Portulaca in the family Portulacaceae, often grown as an annual. It prefers a warm, sunny and dry environment, and is easy to grow and keep alive. The flowers come in many colors and have a light fragrance. So what are the cultivation methods and precautions for moss rose? When does it bloom? What does it symbolize?

Cultivation methods for moss rose:

1. Soil: It is extremely tolerant of poor soil and can adapt to ordinary soil, but well-drained sandy soil is most suitable. You can mix 3 parts mature garden soil, 5 parts yellow sand, 2 parts rice husk ash or fine sawdust, and add a little superphosphate powder, stirring evenly.

2. Light: Moss rose likes plenty of sunshine. If sufficient sunlight can be ensured throughout the growing period, the leaves will be lush and the flowers abundant.

3. Temperature: Moss rose likes a warm climate. The germination temperature is 21-24°C, and seedlings emerge in about 7-10 days. The seedlings are extremely delicate, so if a relatively high temperature is maintained, the young plants grow quickly and can form relatively thick, fleshy stems and leaves.

4. Pests: Moss rose rarely suffers from pests and diseases. You only need to control aphids, almond bees, and globose scale insects on apricot. The key to controlling aphids is to spray before germination, that is, during the flower bud swelling stage. At this stage, imidacloprid 4000-5000 times solution can be used. After germination, use imidacloprid 4000-5000 times solution plus 2000-3000 times cypermethrin solution to kill aphids, and it can also control almond bees at the same time. After fruit set, use 1500 times aphid-killing solution.

5. Fertilizing: Moss rose does not demand much fertilizer. Applying one-thousandth potassium dihydrogen phosphate once every half month can achieve large, brightly colored flowers that bloom continuously.

Cultivation methods for potted moss rose:

1. Soil

Sunflower is not strict about soil and can grow in all types of soil, from fertile soil to poor soil, dry land and saline-alkali land. It has strong salt-alkali tolerance and drought resistance. The most suitable soil pH for growth is 5.8-6.5. Before sterilization and sowing, the soil should be plowed and loosened to improve soil structure and drainage. Good soil permeability is crucial for the growth of sunflowers.

2. Seedling raising

Plug trays and nutrient pots can be used for raising seedlings. The seedling substrate can be prepared with peat, vermiculite and sand in a ratio of 2:1:1, and a small amount of organic fertilizer can be mixed in. Potted sunflower seeds are relatively small and have relatively weak soil-piercing ability, so they should not be sown too deep, generally about 1 cm. After sowing, cover with soil and press lightly. If raising seedlings in winter and spring, cover with film to keep warm and shorten the emergence time. Keep the soil moist after sowing. In summer, seedlings generally emerge in 3 to 5 days, and in winter and spring, generally in 5 to 10 days.

3. Transplanting

Transplanting as early as possible can shorten the seedling recovery time and also prevent the appearance of "leggy seedlings." The plants can be transplanted when they grow 1 pair of true leaves. Two weeks after sowing, sunflower seedlings can grow strong roots. The root system of sunflower seedlings is very strong, which is the basis for ensuring a relatively high transplant survival rate.

4. Watering

Because the root system is relatively developed, it is fairly drought-tolerant. From sowing to bud appearance, it is relatively drought-tolerant, and appropriate drought is beneficial to root development. Later, due to strong light, high temperature, and tall plants with large and luxuriant leaves, water consumption is high. Therefore, the period from bud appearance to flowering is the peak water-demand period, and water must be supplied in time. If the potting soil is too dry, it will seriously affect the quality of flowering, especially for potted plants with small pots and large plants, where water should be replenished in time, otherwise they are prone to dehydration and wilting. However, watering should not be excessive either, as overly wet potting soil can cause leaves to turn yellow. Watering during the growing period should follow the principle of "alternating dry and wet."

5. Fertilizing

It likes fertilizer. During the growing period, apply fertilizer once every 7-10 days. Fertilization at the seedling stage should mainly be nitrogen fertilizer to promote branch and leaf growth and make the seedlings strong; after bud appearance, phosphorus and potassium fertilizer should be added to promote good flower bud development and benefit flowering. When fertilizer is lacking, not only will branches and leaves grow weakly, but the basal leaves of the plant will also turn yellow and wither, ruining the plant's shape.

6. Temperature

Sunflower originated in the tropics, but it has strong adaptability to temperature and is a plant that likes warmth and is also cold-tolerant. Sunflower seeds have strong low-temperature tolerance. When the ground temperature is stable above 2°C, the seeds begin to germinate; at 4-5°C, the seeds can germinate and take root; when the ground temperature reaches 8-10°C, it can meet the needs of seed germination and emergence. The optimum temperature for sunflower germination is 31-37°C. The optimum daytime temperature for growth is 18-30°C, and the nighttime temperature is 10-18°C. Throughout the entire growth process, sunflower can grow normally as long as the temperature is not lower than 10°C. Within the suitable temperature range, the higher the temperature, the faster the development. To prevent midday temperatures above 25°C, ventilation and air exchange should be carried out, and to prevent nighttime temperatures below 13°C, insulation and heating should be carried out.

7. Light

Sunflower is a short-day crop. However, its response to day length is not very sensitive. Sunflower likes sufficient sunlight, and its seedlings, leaves and flower discs all have strong phototropism. Sufficient sunshine at the seedling stage makes the seedlings robust; sufficient sunshine in the middle growth stage can promote stem and leaf growth and flower bud differentiation.

8. Pollination

It is a cross-pollinated plant. Providing artificial supplementary pollination during flowering can increase the seed-setting rate. Double-petaled varieties are not easy to set seed, and also require artificial pollination to increase the seed-setting rate and obtain seeds. The best pollination time is 9-11 a.m., with continuous pollination 2-3 times.

9. Pests and diseases

The incidence of pests and diseases in sunflowers is relatively low. The main diseases are bacterial leaf spot, rust, stem rot, powdery mildew and black spot; the main pests are aphids, mirids, red spiders and beetles, etc., which can be controlled according to symptoms if they occur.

Precautions for growing moss rose:

① Sufficient light. Large-flowered purslane is a strongly heliophilic plant. Both the growth and flowering periods require sufficient sunlight. Whether grown in the open field or in pots, a sunny location with good sunlight should be chosen. If the weather is clear and the climate dry during the flowering period, there will certainly be abundant flowers and bright colors. At the same time, the flowering status changes with sunlight: flowers open when they see sunlight and close when light is insufficient in the early morning and evening, and they do not open on cloudy and rainy days.

② Good drainage. Large-flowered purslane is extremely tolerant of poor soil and not strict about soil, but drainage must be good. When growing in the open field, avoid planting in low-lying areas. For potted soil, loose potting soil should be chosen, otherwise water accumulation and prolonged wetness will cause the plant to rot.

③ Proper fertilizer and water management. Because large-flowered purslane has fleshy stems and leaves and is drought-tolerant, the soil should preferably be slightly dry. Generally, watering when the surface soil turns white is appropriate. During the growing period, liquid fertilizer needs to be applied 2-3 times.

Sowing time for moss rose

Generally speaking, it can be sown in spring, summer and autumn. In most cases it is sown in spring. In the Jiangsu-Zhejiang-Shanghai region, sowing can begin around mid-April. Gardeners farther south or north can adjust the time accordingly. Generally speaking, when the average minimum temperature is around 18°C, it can be sown.

It takes about 50-60 days from sowing to flowering for moss rose.

When does moss rose bloom?

Moss rose is an annual fleshy herbaceous flower. The plant height is 12-15 cm. The stems are slender and round, creeping on the ground, with the tips extending upward at an angle. It has many branches, is slightly reddish in color, and smooth. From June to September it blooms continuously. The flowers are solitary or several clustered at the branch tips. The flower diameter is 3-4 cm. There are double-petaled and single-petaled forms. Because it has the habit of blooming when it sees sunlight, the flowers close in the early morning, evening and on cloudy days, and the stronger the sunlight, the better it blooms, hence the names moss rose and noon flower.

Symbolism of moss rose

The flower language of moss rose: silent love, brightness, passion, loyalty, sunshine, positivity.

Moss rose is a relatively easy flower to keep alive. As long as there is sufficient sunlight, it can bloom brilliantly.