Yellowing of the foliage is an unpleasant phenomenon, it will not allow to fully enjoy the decorative qualities of the plant. What to do if hydrangea leaves turn yellow? Having learned the cause of this phenomenon, you can easily restore the appearance of the flower.
How can hydrangea leaves turn yellow and dry out of season
If hydrangea is yellow, what should I do? To begin with, analyze the condition of the plant, carefully examine, identify the causes. You should be aware that this phenomenon can occur due to natural reasons, due to old age, and may occur due to errors in care.
Paniculata vulgaris
Leaves turn yellow completely and fall off
This phenomenon is most often caused by:
- Waterlogging the soil.
- Cold air and low temperatures.
- Mineral deficiency during budding and flowering.
The leaves turn yellow and the veins are green
If the color of the leaf has changed, and the veins have remained green, the plant is infected with chlorosis. The disease appears due to the use of inappropriate water, which contains lime.
You can deal with trouble with the help of Agricole and Ferovit. You need to make them according to the instructions on the packaging.
Only the edges of the leaf become yellow
During the formation of flowers, the plant must be fed with nitrogen and iron in a timely manner. The lack of these trace elements will lead to yellowing of the lower edge of the sheet.
Causes of yellowing of leaves in garden and room hydrangea
If the green edge of the hydrangea leaf is yellow, the reason most likely is the failure to follow the rules of care:
- wind and drafts;
- non-compliance with lighting standards;
- low acidity of the substrate;
- stagnation of water;
- untimely dressing;
- illnesses.
Yellowing foliage
Lack of light or excessive lighting
Hydrangea is a photophilous species, but does not tolerate direct sunlight. Improper placement of the flower can lead not only to yellowing of the foliage, but also to complete drying of the plant. When choosing a permanent placement, it is necessary to pre-shade, for example, using blinds.
Inadequate lighting is also not welcome for hydrangeas. Placing a flower in the shade will result in a complete absence of flowers and the leaf plates may brighten.
Abnormal lighting
Attention! In the period from 12 to 15 hours, ultraviolet radiation is the most dangerous.
Moisture stagnation
Another reason why hydrangea has yellow leaves is the wrong watering. The flower is demanding for the systematic conduct of this event.
The frequency of watering depends on external factors. If the topsoil has dried up, then moistening should be carried out. Stagnant water in a pot or pan can lead to rotting of the roots and, as a result, yellowing of the leaves and its falling. It is necessary to reduce, and in some cases stop watering hydrangeas.
Hydrangea watering
Dry land
It is not recommended to allow drying of the soil substrate. At elevated temperatures, watering the flower should be carried out twice. To maintain moisture for a longer period, you can mulch.
On a note! For mulch, you can use crushed coniferous bark, cones, wood shavings.
Garden hydrangea must be planted away from trees. Close proximity can harm the flower, as it simply does not have enough moisture for life, growth and it begins to dry.
Low temperature and drafts
At home, the optimal temperature for growing is +22 degrees. If you increase this threshold, then the sheet plates will begin to fade and become yellow.
Sudden changes in the environment are contraindicated for this species: drafts in hydrangea reduce immunity and lead to diseases. Panicled, large-leaved and tree-like varieties at the time of ventilation are recommended to be removed to the place where they are not felt.
The whole autumn-winter period, the plants should be kept in cool rooms. The optimum temperature is +8 degrees. After hibernation, hydrangea can be returned to its previous place.
On a note! Street views should grow in the garden near the fence or near the wall. They must be protected from wind and draft.
Soil depletion
Enrich the soil should be annually. In autumn, the plant lays flower stalks and it requires a large amount of nutrients. If you do not carry out this procedure, then flowering for the next year may simply not come.
The fertilizer solution must contain potassium sulfate and superphosphate components. Diluted in the following proportions: 40 ml per bucket of water.
Low soil acidity
Another reason why hydrangea leaves turn yellow is the alkaline substrate. If the pH is not normal, the leaves turn yellow.
Use for watering water with citric acid will stabilize the required level. To do this, dilute only a few drops of lemon in water.
You can also increase acidity using vinegar. The recipe is as follows: in a bucket of water, 10 ml of vinegar essence must be diluted.
On a note! The essence can be successfully replaced with oxalic acid.
Hydrangea disease
The following diseases affect the color of leaves:
- Chlorous infection. The disease manifests itself in the form of a yellowed leaf plate and bright green veins. For treatment, you need to make the following solution: 2 tablespoons of potassium nitrate must be completely dissolved in a bucket of water. Watering should be carried out once a week, for a month.
- Gray rot. The leaves begin to blacken gradually, then they are deformed and completely crumble. This attack is treated with a 1% solution of Bordeaux fluid.
Chlorosis infection
Root system damage
Hydrangea roots are very weak. Damage them easily enough, for example, when transplanting or during planting a flower. The slightest wounds can lead to plant disease and yellowing of the foliage.
Processing before planting the roots of Zircon will nourish them with strength.
Attention! Pruning root offspring will result in stunted growth and hydrangea disease.
Damaged root system
Why do different types of hydrangeas turn yellow and dry
For different types of hydrangeas, there are conditions and requirements for growing.
- Panicle
Yellowing of foliage in this species is caused by improper care. Panicled is a garden representative and perfectly takes root in the Russian climate. It blooms almost all summer - from June to the end of July.
- Large leaf
This variety is suitable for growing both in the house and on the street. The conditions for obtaining a healthy plant completely coincide with the rules for caring for ordinary geranium. Flowering begins in the spring and lasts almost until the summer.
Yellowing of large-leaved hydrangea is most often caused by fungal diseases.
- Tree-like
Hydrangea shrub is the most unpretentious species. The appearance of yellow leaves indicates a violation of the rules of care.
What to do when yellowing foliage: methods of treatment
If wind and drafts have a detrimental effect, hydrangea must be protected from these natural phenomena. Lighten the sheet plates when non-compliance with lighting standards. A careful and regular inspection will help to adjust the best place for a flower.
Attention! Reduced acidity of the substrate also adversely affects leaf color. Timely adjustment of pH will save this species from decay and death.
The leaves will whiten when infected with powdery mildew. Treatment of the flower with fungicide and preventive measures will not allow this situation to be allowed.
How to feed hydrangea if the leaves turn yellow
There are several proven drugs that can not only protect hydrangea at an early stage of the disease, but literally save the bush from death:
- 1% Bordeaux liquid.
- Iron-containing drugs.
- Phytosporin is universal.
- Potassium sulfate.
- Superphosphate preparations.
Other possible leaf problems
The defeat of the leaf plate can be expressed in different ways. Color change, deformation, complete drying.
- Foliage turns white
Whitening of hydrangea leaves is associated with mildew infection. If the damaged areas are not removed on time, the disease will spread instantly. You can save the flower using any fungicidal agent.
- Leaf plates blacken
The appearance of dry black spots on the leaves indicates the use of inappropriate water and direct sunlight. Changing conditions will instantly correct the situation.
- Leaves twist
Leaf curl occurs due to damage to hydrangea by harmful parasites. You should carefully examine the plant and conduct emergency treatment with insecticides or acaricides.
How to care for hydrangea to avoid yellow leaves
Due to the unpretentiousness of the species, it is not difficult to achieve a healthy growth of hydrangea. The main thing to observe the following rules:
- Watering is carried out with warm and settled water - 2 times a week.
- Loosening the soil after irrigation is a mandatory procedure.
- Timely dressing.
- Maintaining the required temperature and humidity in the room (for indoor varieties).
Lack of nitrogen and iron
Getting a beautiful healthy plant is not a laborious process at all. The main thing is to provide competent and systematic care. Also, one should not forget about preventive measures, the timely implementation of which will avoid diseases and infections.
