Novice flower growers must see: the causes and treatment of the yellowing of rose leaves

Beautiful roses are deeply loved by people. They are often planted in outdoor courtyards and potted plants. The flowers are colorful and the bud is very large, which plays a certain decorative role. When many novices grow flowers, they find that the leaves of roses will turn yellow. What is the cause? What is the way to handle it?

I. the causes and treatment of the yellowing of rose leaves

1. Caused by improper watering

Reason: roses like to be wet, but they are afraid of being too wet and waterlogged, and watering requires special control. Very often, they are always too wet or too dry when watering, that is, too much or too little watering, which may lead to the yellowing of rose leaves.

Solution: when watering the rose, it must be appropriate, and be careful not to let the root of the rose appear stagnant water.

2. Caused by rose rust

Reason: rust is a very common disease in roses. Both leaves and new branches of roses may get rust.

If it does not appear in time, so that the rust is serious, it may make the leaves of the rose yellow to fall off in a large area, which not only affects the beauty of the rose, greatly reduces its ornamental, but also causes plant death.

Solution: if it is found that the rose has rust to be dealt with in time, the treatment method can be sprayed with 800 times liquid triadimefon on the leaf surface, generally once a week, spraying three or four times rust can be solved.

3. Improper fertilization leads to the yellowing of rose leaves.

Reason: fertilization is a must for every kind of flower during maintenance, and so is the rose. Too much fertilizer, or too little fertilizer, can cause the leaves of roses to turn yellow.

Solution: when fertilizing, you should have certain skills to prevent the problem of yellow leaves in roses caused by lack of fertilizer or too much fertilizer. Roses should apply appropriate fertilizers to the soil in autumn when fertilizing. Before autumn, you can spray a small amount of fertilizer on the leaves of roses. Do not apply fertilizer prematurely to prevent roses from burning roots.

Second, how to plant rose seeds?

Rose seeds can be used for raising seedlings, but it is easy to survive by using tender wood cuttings to raise seedlings in the same year. Valuable varieties are difficult to cut and can be propagated by pressing or grafting. Seedlings of asexual reproduction can blossom in the same year. For the seedlings used as potted flowers, the older branches of fine varieties should be selected, the seedlings should be raised by striping method, and attention should be paid to pruning the main buds and artificial dwarfing. For seedlings used as cut flowers, varieties that can form mother branches and colorful flowers should be selected to raise seedlings.

Third, how to prune potted roses?

1. Pruning new buds after growth

How to prune potted roses, first of all, after the new buds begin to expand, and sprouting is the sign of pruning. Pruning will not cause any harm to the rose when the new bud is just growing. At this time, flower friends need to check whether the stem has buds and leaves to grow, if the rose does not show any signs of growth since autumn, wait a few weeks after the bud to be pruned.

Pruning method: if the height of the new branch is more than 30 cm, cut off about 2 prime 3, and if it is less than 30 cm, cut off about 1 big 2, and the plant that is too small can not be pruned.

2. Dormant pruning

After the frost, that is, the dormancy period of the rose, it may be in January or February, depending on where you live. After frost is the best time for sick and dead branches, because there will be no more frost, so there is no need to worry about low temperature damage to roses after pruning.

Pruning method: how to prune potted roses? at this time, flower friends can cut off withered branches, disease and insect branches, cross branches, thin and weak branches and twigs that germinate after autumn.

3. Pruning after flowering

The third period of time for the pruning of roses is after flowering. The rose flower has strong sprouting power and luxuriant growth. if it is not pruned in time, it is prone to diseases and insect pests under the conditions of muggy, humid, lack of light and poor ventilation, so a pruning should be carried out after the rose flowering period.

Note: some roses need to be pruned after flowering, while others are dormant. The method of judgment is that the rose grows new branches in the spring and blossoms on the new branches, which means that it can be pruned during the dormant period; if the flowers bloom on the old branches, the branches need to be cut off after flowering.