Keep warm indoors: After the outdoor temperature drops below 10 degrees, move the periwinkle indoors and keep the temperature above 10 degrees. Sunbathe frequently: Place the plant on a south-facing balcony to receive full sunlight. Strictly control water and fertilizer: water once a week and postpone fertilization in winter. Pruning and shaping: Cut off thin branches and blackened branches.

How to spend the winter with periwinkles

1. Keep warm indoors

Periwinkles have strong cold tolerance. In the south, they can sleep outdoors for the winter. However, in order to avoid frostbite on the plants, , it is best to move it indoors for maintenance in time after the outdoor temperature drops below 10 degrees. Use heating facilities to keep the room temperature above 10 degrees, and regularly open windows for ventilation to maintain air circulation.

2. Sunbathe frequently

Catharanthus roseus is a sun-loving flower with a large demand for light. It is prone to leggy growth in long-term shade. It only grows branches and leaves but does not bloom. Therefore, in winter When cultivating periwinkles, place them by a south-facing or sunny window so that the plants receive full sunlight. If the weather is dark, you need to use plant fill lights instead of sunlight.

3. Strictly control water and fertilizer

Catharanthus roseus, like most plants, has a reduced demand for water and nutrients after entering winter. During the breeding process, it must be strictly controlled. For water and fertilizer, watering can be done once a week. Watering should be done at noon on a sunny day. Use water close to room temperature. However, fertilizer cannot be applied in winter. Generally, slow-release fertilizer can be applied once before winter.

4. Pruning and shaping

The branches and leaves of periwinkle are very dense. In a warm and closed indoor environment, bacteria can easily breed and induce diseases and insect pests. Therefore, periwinkle must be pruned in winter. Use scissors to cut off branches that are too thin, and then cut off poorly growing, thin, and blackened branches to reduce nutrient consumption, and also remove residual branches and leaves in the flowerpot.