When Do Roses Bloom? A Detailed Guide to the Blooming Period
When we mention roses (Rosa chinensis), none of us feels unfamiliar with them, because their blooming period is long, and they are also called "monthly red," with a natural blooming period from May to November, flowering continuously without interruption. Today, the editor will introduce to you when roses bloom and what the blooming conditions for roses are!
When do roses bloom?
Roses begin to bloom in mid-May each year and can continue until mid-November, with a blooming period as long as 200 days, hence the name "monthly red." When the flowers open, they have a very pleasant fragrance. As for the rose blooming period, it is generally said that the first batch of flowers in spring lasts a relatively long time, and the last batch of flowers before winter lasts the longest. This mainly depends on temperature: the higher the temperature, the shorter the blooming period; the lower the temperature, the longer the blooming period. In addition, flowers with hard petals and thick petals have longer blooming periods; any with soft petals and thin petals have shorter blooming periods.
What are the blooming conditions for roses?
1. Sunlight must be long: The place where 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 them to bloom abundantly like brocade. If placed in a spot with half shade and half sun or in a shady place with insufficient light, they can bloom at most only twice a year, in spring and autumn. Therefore, households whose living conditions cannot meet the light requirements are best advised not to grow roses and instead grow flowers and plants that are more shade-tolerant.
2. Regular pruning is necessary: Although the sunlight conditions may be good, if roses are not pruned for a long time, they will not grow well either. The pruning method is as follows: After December each year, when the rose leaves fall, carry out one pruning, leaving branches about 15 cm high, with the pruning point about 1 cm above an outward-growing leaf bud, and at the same time remove side branches, diseased branches, and concentric branches. After May, each time a round of flowers finishes blooming, 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 bloom larger, you can also remove part of the buds when there are many, which can both concentrate nutrients and achieve the purpose of extending the blooming period and allowing opening in batches.
3. Fertilization should be frequent and timely: Generally, newly planted or transplanted potted roses can be cultivated with humus-rich and loose loess, preferably mixed with 1/4 rice husk ash or a small amount of broad bean shells, bean cake, or chicken and pigeon manure, so that the roses can continuously absorb various nutrients such as nitrogen, phosphorus, and potassium from the soil. If older potted roses need repotting, base fertilizer can also be applied as above; if not repotting, you can scrape open the soil surface 2-3 cm and work in some fresh fish intestines or chicken and pigeon manure, bean cake crumbs, etc. as base fertilizer. This is best done in January to February when the roses are dormant. In this way, the fertilizer will gradually ferment into fertilizer liquid and seep into the roots with rainwater or irrigation water, achieving better results. After May is the peak growing season for roses. Every 10 days, apply a topdressing once. You can use fully fermented fishy liquid or vegetable leaf liquid, mixed at a ratio of 3 parts fertilizer to 7 parts water, and stop fertilizing in November. If you can do as required above, you can make rose flowers meet you every month. Roses are naturally averse to heat, and they grow best when the temperature is 20-25°C; above 30°C, growth becomes difficult. If you handle fertilization well, you can overcome their weakness of fearing high temperatures in summer.
4. Repotting: Roses do not need to be repotted or have their pots turned every year. If it is moving from a small pot to a large pot, it can be done in any of the four seasons.
How can roses bloom more?
1. 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 sprouting. For potted roses, repot once in early spring. The potting soil formula is: (loam) 5 : (leaf mold) 2 : (rotted 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 with phosphate fertilizer and apply it diluted with water. Especially after the peak bloom in May, fertilizer should be applied in time to promote summer and autumn blooming.
2. During the growing season, roses should receive sufficient sunlight, preferably maintaining 8 hours of light per day. If used for indoor viewing, they 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 blooming time.
3. Roses enter a semi-dormant state above 33°C, and an average temperature of 20-25°C is most favorable for growth. 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 in the morning and once in the afternoon, creating a humid environment and promoting the growth of flowers and leaves.
4. After roses bloom, they should be cut below the third compound leaf beneath the flower, to promote the growth of strong new branches and early bud formation and blooming. The key points of pruning technique are: weak and short branches should be pruned first and pruned high; vigorous branches should be pruned later and pruned short, so as to promote the weak and restrain the strong, and encourage uniform blooming. The pruning length of long branches should not exceed 1/2, to avoid slow germination of axillary buds. In addition, too many flowers should not be retained in each round; for potted roses, 3-5 flowers are appropriate, while for ground-planted roses it depends on the strength of the plant. Retaining too many flowers disperses nutrients too much, makes the flowers small, and affects the next round of blooming.