When do roses (Chinese rose) usually bloom?
When we mention the Chinese rose, none of us feel unfamiliar with it, because it has a long flowering period and is also called “Monthly Red”; its natural flowering period is from May to November, blooming continuously. Today, the editor will introduce to you when the Chinese rose blooms and what the flowering conditions of the Chinese rose are!
When does the Chinese rose bloom?
The Chinese rose begins to bloom in mid-May every year and can continue until mid-November. Its flowering period lasts as long as 200 days, so it is named “Monthly Red.” When the flowers open, they have a very pleasant fragrance. Generally speaking, the first batch of flowers in spring has a longer flowering period, and the last batch before winter has the longest flowering period. This mainly depends on temperature: the higher the temperature, the shorter the flowering period; the lower the temperature, the longer the flowering period. In addition, flowers with hard petals and thick petals have longer flowering periods; any with soft petals and thin petals have shorter flowering periods.
What are the flowering conditions of the Chinese rose?
1. Sunlight must be long: The place where Chinese roses are planted must be both well ventilated and able to receive more than half a day of sunlight. This is the primary condition for it to bloom in abundance like brocade. If placed in a half-shade, half-sun location or in a shady place with insufficient light, it can bloom at most only in spring and autumn in a year. Therefore, families whose living conditions cannot meet the light requirements had best not grow Chinese roses and instead grow flowers and plants that are more shade-tolerant.
2. Regular pruning is necessary: Although the sunlight conditions are good, if it is not pruned for a long time, the Chinese rose will not grow well either. The pruning method is: after December each year, when the Chinese rose leaves fall, carry out one pruning. The remaining branches should be about 15 cm high, and the pruning position should be about 1 cm above an outward-growing leaf bud. At the same time, remove side branches, diseased branches and concentric branches. After May, each time a round of flowering finishes, cut off 2/3 or 1/2 of the branch that has already bloomed, so there will be more opportunities for regenerated flower buds. If you want the flowers to be larger, you can also remove part of them when there are many flower buds, which can both concentrate nutrients and achieve the purpose of extending the flowering period and opening in batches.
3. Fertilization should be frequent and timely: Generally, for newly planted or transplanted potted Chinese roses, loose loess rich in humus can be used for cultivation. It is best to mix in 1/4 rice husk ash or a small amount of broad bean shells, bean cake or chicken and pigeon manure, etc., so that the Chinese rose can continuously absorb various nutrients such as nitrogen, phosphorus and potassium from the soil. For old potted Chinese roses that need repotting, base fertilizer can also be applied as above; for those not being repotted, you can scrape open 2-3 cm of the soil surface and add some fresh fish offal or chicken and pigeon manure, bean cake crumbs, etc. as base fertilizer. This is best done in January to February when the Chinese rose is dormant. In this way, the fertilizer will gradually ferment and become fertilizer liquid, which will seep into the roots with rain or irrigation water and achieve a better effect. After May is the peak growth season for Chinese roses. Every 10 days, apply topdressing once. You can use fully decomposed and fermented fishy juice or vegetable leaf juice, mixed at a ratio of 3 parts fertilizer to 7 parts water and applied. Stop fertilizing in November. If you can do as required above, you can make the fresh flowers of the Chinese rose meet you every month. The Chinese rose is by nature averse to heat. It grows best when the temperature is 20-25°C; above 30 degrees, growth becomes difficult. If fertilization is handled well, you can overcome its weakness of fearing high temperatures in summer.
4. Repotting: Chinese roses do not need to be repotted or have their pots turned every year. If repotting from a small pot to a large pot, it can be done in all four seasons.
How can the Chinese rose bloom more?
1. Chinese roses have large flowers and many blooms, so they need a lot of fertilizer. Therefore, more fertilizer should be applied, and sufficient organic fertilizer should be applied before budding. For potted Chinese roses, repot once in early spring. The potting soil formula is: (loam) 5 : (leaf mold) 2 : (decomposed manure) 2 : (sandy soil) 1, then add a small amount of rapeseed cake and mix it evenly. After that, apply topdressing once every 10-15 days. For topdressing, you can use liquid fertilizer made by composting cake fertilizer plus phosphate fertilizer, diluted with water and applied. Especially after the full bloom in May, fertilizer should be applied in time to promote flowering in summer and autumn.
2. During the growing season, the Chinese rose should receive sufficient sunlight, and it is best to maintain 8 hours of light per day. If it is for indoor viewing, it should be moved in before 11 a.m. and moved out before 4 p.m., so as to receive the soft light around noon, which helps extend the flowering time.
3. The Chinese rose is in a semi-dormant state above 33°C, and growth is most favored when the average temperature is 20-25°C. Therefore, in summer, appropriate shading and frequent water spraying should be carried out. To lower the temperature and replenish humidity, during the growing season it is best to spray water once each in the morning and afternoon, creating a humid environment and promoting the growth of flowers and leaves.
4. After the Chinese rose blooms, it should be cut below the third compound leaf under the flower to promote the emergence of strong new branches and early flower buds and blooming. The key points of pruning technique are: weak and short branches should be pruned first and pruned high; robust branches should be pruned later and pruned short, so as to promote the weak and suppress the strong, and encourage neat flowering. The pruning length of long branches should not exceed 1/2, to avoid slow germination of axillary buds. In addition, it is not advisable to keep too many flowers per round. For potted Chinese roses, 3-5 flowers are appropriate; for ground-planted Chinese roses, it depends on the strength of the plant. Keeping too many flowers disperses nutrients too much, making the flowers small and affecting the next round of flowering.