- High temperatures and intense sun in summer can destroy hydrangeas, leading to wilting, burns and loss of their lush blooms.
- There is a simple, home-made way to strengthen the bushes: coffee grounds, which should be used at the right time to prevent the negative effects of heat.
- Find out how to properly use this natural ingredient to make your hydrangeas delight with their beauty all summer long, even on the hottest days!
Fertilizing hydrangeas in summer. What to do to make the bushes bloom beautifully?
These are some of the most beautiful ornamental shrubs that delight in many Polish gardens all summer long. Unfortunately, high temperatures and intense sun may have a negative impact on the flowers in our garden, including the lushly blooming hydrangeas. Intense solar radiation, especially in the afternoon, can cause sunburn on leaves and flower buds. These burns manifest as brown spots and tissue damage. In turn, high temperature causes water to evaporate faster from leaves and flower petals. If the plant does not receive enough water, it begins to wilt and dry out. , they may fade faster and lose their charm. Hot weather also causes heat stress in plants, which weakens their resistance to diseases and pests. Then, in addition to more intensive irrigation and, if possible, shielding the bushes from the sun, it is also worth ensuring that they are richer.
Homemade hydrangea fertilizer for hot weather. Sprinkle it thinly under the bushes today and you will strengthen it for hot days
One of the most effective fertilizers for hydrangeas during hot weather are coffee grounds. However, remember to perform the treatment before they arrive, as excess nitrogen contained in them may harm the plant. How to use coffee grounds under hydrangeas? You should not spread a thick layer of just coffee grounds directly onto the soil, especially when they are wet. They can form a hard, impermeable crust that prevents water and air from entering the soil and also promotes the growth of mold. Simply sprinkle a thin layer (0.5-1 cm maximum) around the hydrangea, avoiding direct contact with the trunk. Then cover the grounds with a thicker layer of traditional mulch, such as pine bark, wood chips or straw.
How do coffee grounds work on hydrangeas?
First of all, it is worth noting that coffee grounds enrich the soil with organic matter, improving its structure, aeration and water-holding capacity. This is really important during droughts and heatwaves. They are used to create a mulch that limits the evaporation of water from the soil surface and protects the roots from overheating. The coffee grounds will slowly decompose, enriching the soil with nitrogen and organic matter.
