Detailed Guide to Growing Hardy Hibiscus
1. Hardy hibiscus is an annual seedling, with a flowering period from June to October; plants over two years old flower from July to October. Capsule fruit. Each fruit contains 40-60 seeds; the seeds are round, brown, with a seed coat that splits easily, and 0.2 cm in diameter.
2. Hardy hibiscus is sown in the open field in early April. At 20-25°C, it sprouts 3-5 days after sowing. Ten days later, it is transplanted and planted out in flat beds. It blooms in early to mid-June of that year, and the flowering period lasts until early November.
3. After each flowering, prune promptly, cutting away the spent branches and the seeds that have formed after the previous bloom; this can increase the flower quantity of the next flowering peak. Especially after the second peak, pruning should be done promptly to ensure the quantity and quality of the next bloom. If left to grow naturally, the flower quantity in the later period will decrease accordingly.
4. Annual seedlings of hardy hibiscus can overwinter safely under extensive management conditions. For plants over 2 years old, since the root system is already fairly well developed, there is no longer any frost damage during overwintering. Plants over 3 years old sprout more; those planted at a spacing of 60 cm between plants and rows should be divided. Otherwise, the branches and leaves become too dense, flowering decreases, and they are prone to lodging in wind and rain.
Hardy hibiscus loves the sun and is not afraid of high temperatures and intense exposure, so when planting hardy hibiscus, we should place it on a balcony or in a sunny spot as much as possible; this will make hardy hibiscus grow more vibrantly.
How to Grow Hardy Hibiscus
Planting and Water and Fertilizer Management
Hardy hibiscus can be planted in either early spring or late autumn. Fermented horse manure or chicken manure can be used as a base fertilizer, mixed thoroughly with the soil. When planting in spring, do not plant too deep; in autumn, do the opposite. After planting in spring, water immediately, then water a second time five days later, and a third time a week after that; thereafter water thoroughly once a month. However, a single watering should not be too much; an appropriate amount is sufficient.
Pruning
The natural crown shape of hardy hibiscus is relatively loose, so during care it needs to be pruned according to the conditions of the planting area. Three aspects need to be fully considered: first, make sure it does not affect pedestrians; second, shorten overly long branches to improve the flower shape; third, prune excess branches promptly to prevent insufficient nutrients.
Hardy hibiscus has very low requirements for the environment, but when cultivating it, you need to care for it attentively. When cultivating it, we can choose sowing, cuttings, or division methods, and all can be grown successfully.
How to Grow Hardy Hibiscus
1. Seed Sowing Treatment
Hardy hibiscus is mostly propagated by sowing seeds. We can buy seeds online, soak the seeds in clean water for 4-6 hours, then sow them shallowly in a seedling tray. Basically, they will take root and sprout in about 1 week. After the seedlings grow 2-3 pairs of true leaves, they can be transplanted. Do not plant them too densely; if using a 2-gallon flower pot, about 3 can be planted in it. If planted too densely, it will affect plant growth. The sowing time can be either autumn or spring.
2. Soil Selection and Planting
Hardy hibiscus can grow well in most soils, but it prefers slightly acidic soil rich in humus. So when planting in the ground, we can use the following soil mix: peat soil, leaf mold, and perlite at 1:1:1, placed into the hole where the hibiscus is to be planted. In this way, the hibiscus will recover from transplanting very well and grow quickly.
3. Light and Temperature Control
Hardy hibiscus likes light, so it must have sufficient sunlight and needs long periods of exposure; this is why its flowers are more natural in midsummer, because it receives enough light. It does not have high temperature requirements and can grow at both high and low temperatures. Just note that in the north, when temperatures are too low, hardy hibiscus needs protection; you can spread a layer of straw on the soil surface for protection, and the next year you will see it produce many beautiful flowers again.
Now that you understand the specific growing methods and have admired many beautiful pictures of hardy hibiscus, from the pictures the flowers are very large, so what is their diameter? Let's learn about it together with the editor.