When is the best time to plant coleus seeds
Today, the editor introduces the best time to plant coleus seeds and related green plant content about coleus seed planting techniques, which will surely help you. Let's learn about it together!
Coleus is also known as painted nettle, ornamental mint, and鞘蕊花. It belongs to the Lamiaceae family, Salvia genus. It is native to tropical or subtropical regions of Asia, Australia, and the South Pacific.
【Morphological characteristics】
Coleus is a perennial herbaceous flower, often cultivated as an annual or biennial ornamental leafy plant in China. The plant height is 20-60 centimeters. The stem is square. The leaves are opposite, ovate, and the leaf margin has various notches. The leaf color varies greatly, with yellow, green, red, purple, and other colors, as well as multi-colored patterns forming beautiful patterns. The ornamental period of outdoor cultivation is from June to October.
It has racemes, terminal. The flowers are small and inconspicuous, light blue and white. The nuts are small and smooth. There are about 3500 seeds per gram.
According to the variation of leaf shape, coleus can be divided into four major horticultural varieties.
1. Large-leaf variety: The plant is tall, with few branches, and has large ovate leaves with uneven leaf surfaces.
2. Small-leaf variety: The leaves are small, oblong, pointed at the apex, with smooth leaf surfaces and colorful leaf colors.
3. Crinkled-leaf variety: The leaf edges are lobed with wavy wrinkles.
4. Dwarf variety: The plant is short, with many branches at the base, a compact plant shape, narrow and long leaves, suitable for hanging pot planting.
【Growth habits】
Coleus prefers a sunny and warm growing environment, is not cold-tolerant, and the most suitable growing temperature is 20-25°C. When the room temperature is below 15°C, it will grow poorly, and if it is below 5°C, it will cause chilling injury. Its leaves are large and thin, not drought-tolerant, and the soil drying will cause the leaf surface color to fade. It grows best in sandy loam soil rich in humus and good drainage.
【Propagation methods】
Coleus is mainly propagated by seeds, and can also be propagated by cuttings. Outdoor sowing is generally carried out in May, while greenhouse sowing can be done all year round.
The optimal germination temperature for seeds is 20-25°C. Since the seeds are small, they need to be mixed with fine sand for sowing. The seeds require light during germination, so do not cover the soil after sowing, water with the immersion pot method, and the seeds can germinate in about 7-10 days. When the seedlings grow to 6-8 centimeters tall, transplant them into small pots.
Cutting propagation can be carried out all year round, and it is more suitable to do so in July and August during pruning. The cutting method is simple: cut branches with three nodes about 10 centimeters long and insert them into river sand, making sure there is a node in the sand to root from.
After cutting, shade and keep moist, and it will take about 2 weeks to root and recover growth.
When is the best time to plant coleus seeds
【Cultivation management】
The cultivation soil for coleus should be mixed in a ratio of 3 parts loam, 1 part leaf mold, and 1 part river sand, and mixed with organic fertilizer as a base fertilizer.
After the seedlings are transplanted, they should be frequently fertilized with water during their growth process, applying a dilute liquid fertilizer (such as decomposed soybean cake or human waste) once a week to promote lush growth of branches and leaves. Watering is needed every day to maintain soil moisture, otherwise, the soil drying will cause the leaf surface to lose color. It is also necessary to spray water on the leaf surface frequently to wash away dust, keeping the leaf surface colorful and beautiful. During the seedling stage, the plants should be pinched multiple times to shape them into a full and bushy appearance. After flowering, prune once, leaving 2-3 nodes on each branch stem, cutting off the upper branches to promote the growth of new shoots.
Since coleus is mainly propagated by seeds, the traits of seedlings can easily vary, so it is necessary to promptly remove and eliminate seedlings with bland colors and ordinary leaf shapes during the seedling stage, and retain the strong and good-quality seedlings.
【Uses】
Coleus has a highly variable and colorful leaf color, is easy to propagate, grows rapidly, and is an excellent ornamental leafy plant widely used in flower bed arrangements, potted plants, and as leaf material for making cut flowers.
Its leaves can be used as medicine, with the effects of cooling and reducing swelling, and can treat snake bites.
【Cultivation tips】
First, the cultivation soil requires good permeability and avoids waterlogging, as it can easily cause root rot and plant collapse.
Second, ensure sufficient sunlight during the growing period to make the leaves bright, but direct strong sunlight in summer can damage the pigments, making the leaf colors less vivid, so appropriate shading is needed.
Third, water frequently, especially in summer, to prevent the cultivation soil from drying out to maintain bright leaf colors.
The above is a comprehensive explanation of when to plant coleus seeds and coleus seed planting techniques from the Green Plant Enthusiast website, hoping to solve your green plant problems.