Why do hydrangea stems turn black? Can hydrangeas be repotted during flowering?

Hydrangeas are easy to grow, and they have many small flowers clustered together, which is very ornamental. In addition, by controlling the pH of the soil, hydrangeas can bloom in different colors. They are also easy to keep. So what should I do if the hydrangea stems turn black?

Why do hydrangea stems turn black?

First of all, when the branches of hydrangea turn black, you should first check whether the roots have rotted. If the roots are rotten, then cut off the rotten roots and blackened branches in time, and replant them in plain soil. If only the branches are rotten and the roots are good and healthy, then prune the branches in time and you can use carbendazim to water the branches and roots.

If the roots of the hydrangea are rotten and the branches are damaged, we can cut off some healthier branches as soon as possible for propagation by cuttings. Hydrangeas are easy to grow roots and grow roots very quickly, so cuttings can be taken at any time.

When we care for hydrangeas, we should pay attention to watering. We should wait until the soil in the pot is slightly dry before watering. Do not water too frequently, especially for hydrangea potted plants grown indoors. Waterlogging in the soil in the pot will cause root rot and blackening of branches and trunks.

Hydrangeas like sunlight. Except for a little shade in the summer, they should be kept in a place with sufficient light and good ventilation in other seasons. Especially if placed in an unventilated corner, it will cause the branches to turn black and the roots to rot.

Can hydrangeas be repotted during flowering period?

For hydrangeas, potting is no problem at all, and they can grow just as well as planting in the ground. However, hydrangeas grow very fast, and you need to change pots frequently after buying the seedlings. Eventually, they will be planted in a very large pot. If not pruned, a pot of hydrangea can occupy more than one square meter of space. Of course, the larger the pot, the better.

Repotting hydrangeas can be done at any time. Just remember to change the pot but not the soil.

The specific method is to take off the flower pot without disturbing the soil ball, and put it directly in a pot two sizes larger and fill it with soil. If it is troublesome, you can also put it directly in a larger pot. We generally do not recommend planting small seedlings in large pots for roses. For hydrangeas, the requirements are not so strict, and a larger pot will not affect the growth of seedlings.

There is no need to slow down the hydrangea after repotting, because it will not affect its growth at all. Just remember not to cut off the water. Hydrangea needs a lot of water during its growth.

In fact, it is easier to control the growth of potted hydrangeas than those planted in the ground, especially when you need to adjust the color. It is very easy to control the pH of the soil within the required range to make the hydrangea bloom in the color you like. If you plant it in the ground, you need a lot of raw materials to make the whole piece of land acidic, and you have to adjust a large piece of land at a time.

Can hydrangea be transplanted in autumn and winter?

If it is a potted seedling, it can be transplanted all year round; if it is a ground-planted seedling, it is recommended to transplant it in early spring as the survival rate is high.

Plant it in autumn or early winter. It will have bare leaves but the roots will continue to grow. Winter is the key period for it to grow roots. It will take a whole winter to grow roots. In the spring of the following year, you only need to wait for it to sprout, grow leaves, and form flower buds. In early summer, you will have beautiful flowers to see.

In winter, hydrangea seedlings can only be transplanted in early winter when the temperature is not too low. If the temperature is below zero degrees, the hydrangea seedlings are not frost-resistant, especially cannot withstand the tossing of express delivery.

Of course, you can also choose to buy seedlings and plant them in spring, but it will take some time for them to grow roots if planted at this time. Compared with those planted in autumn and winter, their growth and development will be much later, which may cause them to bloom very late or even not bloom that year.