How to Help Roses Survive the Summer Better
A brief knowledge on the reasons for rose root damage, let's learn about it together.
This year's weather is exceptionally hot, and many rose enthusiasts have encountered problems with their roses, for example, the following rose plant. It is clearly visible that the new leaves are turning yellow, the top buds are curling, or drying out. The older leaves have crispy tips and edges, resembling fertilizer burn. Why do these phenomena occur?
The symptoms seen in roses during summer are rooted in root damage, and the causes of such damage are usually as follows.
One, Causes of Rose Root Damage
1. -- Drought and Water Deficiency --
Summer weather is hot with high evaporation rates, and water consumption is rapid, especially for outdoor potted roses. The potting soil dries easily, and if watering is not timely, roses can suffer from drought, damaging the fine roots. Additionally, with direct sunlight, the leaves can become severely dehydrated and easily sunburned, showing symptoms similar to fertilizer burn.
If roses have many leaves, it is best to water them in the morning and evening during summer to maintain sufficient moisture. However, this is的前提 that the potting soil has good drainage and does not accumulate water. If the soil has poor drainage, watering should be cautious, as积水 can easily cause root rot, making it harder to save the plant.
2. -- High Potting Soil Temperature --
Most roses that have problems in summer are potted ones, as the small pots heat up quickly under the sun, making the pot walls very hot. Since many fine roots of potted roses grow close to the pot walls, they can easily be scorched. Dead fine roots reduce the plant's absorption capacity, and with the high soil temperature, roses can show symptoms like yellowing leaves and stunted growth.
3. -- Watering at Noon --
Watering at noon in summer is a no-go, as it's too hot. First, the potting soil is very hot, and pouring water causes a large temperature difference, which is not good for the roots. However, that's not the main issue. When water is poured into the soil, it becomes very hot when exposed to the sun, making it feel like the roots are soaked in warm water. It's not just hot but also humid, with insufficient oxygen for root respiration, leading to root rot.
Therefore, it's best to water in the morning and evening during summer. However, if the plant is found to be short of water at noon, it is still necessary to water, as occasional watering at noon causes limited damage to the rose roots, but without water, a rose can easily die of drought in an afternoon.
Two, How to Help Roses Survive the Summer Better
In such hot weather as this year, it is recommended to provide shade for roses, or give them only half-day sunlight in the morning. After shading and cooling, the evaporation of moisture in roses slows down, and the pressure to water decreases significantly.
Besides shading and cooling, it is also a good idea to sprinkle water on the pot walls and the ground around 4 p.m. every day to lower the temperature. If there is grass or mud, it's best to place the pot on the grass, which is much cooler than concrete. If placing on grass is not possible, avoid direct placement on concrete and use a wooden stand instead, which enhances ventilation and avoids heat radiation from the ground.
Potted shrub roses should temporarily stop using fast-acting fertilizers in summer to avoid black stems caused by fertilizer burn.
The above is a detailed introduction to the causes of rose root damage and how to help roses survive the summer better, for reference by netizens.