Does the Chinese rose bloom in autumn?
Are you curious about the knowledge of roses, such as whether Chinese roses bloom in autumn? Let's take a look together.
Many beginners with Chinese roses don't know if they bloom in autumn. Generally speaking, most Chinese roses bloom in multiple seasons. After the high-temperature period of summer, Chinese roses will enter a blooming period in autumn, usually in the first or second ten days of October (there may be differences due to various climates). It is necessary to seize the opportunity formed by the change of climate conditions to cultivate blooming branches.
Let's look at the maintenance methods for Chinese roses in autumn: normal pruning and fertilizing timing: when the daily temperature is below 28°C and the air humidity is above 60%, it's suitable before the rain.
1. Pruning Chinese roses in autumn: First, cut off the weak and diseased branches, withered branches, and intertwined branches (in the lower part of the plant) formed in summer.
(1) Pruning of vertical branches: Medium pruning should be done on vertical basic branches or lateral branches formed under cool summer conditions to promote new axillary buds (except for climbing Chinese roses). Position: Leave 5 complete leaves at the bottom of the basic branches, and 3 complete leaves at the bottom of the lateral branches, and cut off the rest of the upper part. If the lower part of the branch has already shed leaves, observe the leaf scar area, leaving 5 full buds for each basic branch and 2-3 for each drooping branch. When any bud on the branch grows into a five-leaflet leaf, cut off the branch above the reserved uppermost bud (or remove the bud).
(2) Pruning of normal branches (with leaves at the bottom): Do not prune all main branches. Lateral branches: Leave 3 buds for each secondary branch, and 2 buds for each branch, pruning the rest (or removing the buds), and handle the branches without leaves as described above.
(3) Climbing Chinese roses (including large shrub-type climbers): For plants over one year old, cut the lateral branches (short branches) that have bloomed in half, and secure the long branches at the top after flowering. For current year plants (or those transplanted this year), a light pruning is sufficient, just cut off the top two five-leaflets (or three-leaflets) of the lateral branches, and secure the long branches in the same way.
(4) For branches pruned in summer, if they grow slowly and have few branches, there is no need to prune again.
(5) Theoretical calculation of the total number of branches and flowers for normal potted Chinese roses (full-flowered Chinese roses, shrub Chinese roses): Cultivate 5 primary main branches (including basic branches), each with 3 secondary branches, and each secondary branch with 2 tertiary branches. If all tertiary branches bloom at the same time, the number of flowers will be 30. Note: Only the main buds are counted, not the multi-headed secondary buds; it is difficult to achieve such a precise and abundant number of flowers in outdoor potted Chinese roses.
(6) Pruning of mini Chinese roses: For strong plants over one year old, a medium pruning can be done, cutting all branches in half. For current year plants, cut off one-third of the height to get satisfactory autumn flowers.
2. Fertilizing and watering Chinese roses in autumn
(1) When the climate conditions change, Chinese roses wake up from a semi-dormant state (except for plants that are not semi-dormant), and at this time, the amount and frequency of fertilization should be gradually increased.
(2) First, use a high-nitrogen compound fertilizer for root irrigation of the plants, about once every 5 days, continuously, and stop after four times. After the buds sprout, when the stem elongates to about 4 centimeters, spray phosphorus and potassium on the branches and leaves, up to three times, with an interval of 5 days, and stop after the flower buds show color.
(3) For plants with poor activity or affected by diseases and pests, with few complete leaves and few sprouting buds, a mixture of brassinolide and potassium metaphosphate solution can be sprayed on the branches and leaves, once every 15 days, up to 2 times, which can speed up the growth of new buds.
(4) For plants with granular slow-release fertilizer or organic fertilizer buried in the pot, additional and supplementary fertilization should be done according to the time of fertilizer effect.
(5) In autumn, the weather is generally dry and the night temperature is low, so it's best to water the plants sufficiently in the morning, and it's not suitable to water at night. If there is a high temperature and dry climate, shade the plants and spray to cool and humidify as in summer.
(6) Since the overall humidity of the air in autumn is lower than in spring, the germination of buds is slower, and the growth of the plant is also slower, requiring patience; the rhythm of fertilizing and watering should be adjusted according to climate changes. In high autumn dryness, the interval between fertilizing should be appropriately extended to avoid fertilizer damage, and at the same time, watering should not be neglected to avoid drought and yellowing of the leaves.
3. Diseases and pests
(1) Diseases: In the southern high-temperature and humid areas, continue to prevent and treat powdery mildew and black spot disease. In the northern cool and dry areas, the disease incidence of Chinese rose plants is usually very low after entering autumn.
(2) Pests: In autumn, whiteflies, leafrollers, and thrips are serious, and continue to spray pesticides for prevention and control.
4. Others:
In areas in the south without dormancy throughout the year (moderate temperature and high humidity), continue to pinch and top the Chinese roses to control the growth rate of the plant's nutrients and maintain the plant shape. In the northern regions where winter comes early, control the use of nitrogen fertilizer after flowering in autumn to avoid frost damage to the autumn shoots and to avoid consuming the plant's nutrients, reducing the plant's frost resistance.
The above content about whether Chinese roses bloom in autumn (including autumn maintenance methods) is shared, have green plant enthusiasts understood?