AT A GLANCE
How do I recognize and treat a magnesium deficiency in hydrangeas?
What do hydrangeas need magnesium for?
Magnesium plays an important role in this healthy growth of hydrangeas. You need the mineral to efficiently carry out photosynthesis. In addition, magnesium controls the activity of many enzymes in plants (and also in humans, by the way) and contributes to cell respiration.
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Why are hydrangeas often affected by a magnesium deficiency?
je acidic soil is, the less magnesium it usually contains. At the same time, plants with a low pH value are less able to absorb nutrients. Since hydrangeas prefer acidic soil, fertilizing with magnesium plays a particularly important role.
How do I recognize a magnesium deficiency in hydrangeas?
With a magnesium deficiency, hydrangeas produce less chlorophyll. Yellow leaves, a so-called chlorosis, are the result. The discoloration first appears in the center of the leaf of older leaves and then slowly spreads to the edge of the leaf. The leaf veins usually remain green. This deficiency symptom leaves a magnesium deficiency safe from one iron deficiency distinguish, in which the yellowing occurs first at the edges of the leaf and then progresses towards the middle.
Which fertilizers for hydrangeas contain magnesium?
The quickest effect of a magnesium deficiency is on hydrangeas fertilization with Epsom salt against, that too conifers is often used. However, kieserite and dolomite also contain a particularly high level of magnesium so that the deficiency can be remedied quickly.
When do hydrangeas need a magnesium fertilizer?
At the latest when your hydrangeas clear signs of magnesium deficiency indicate that you should start fertilizing with magnesium. Many gardeners apply magnesium fertilizers like Epsom salt also preventively. However, before you suspect magnesium fertilize, you should have one soil analysis to be able to clearly determine a magnesium deficiency in the soil.
Tip
Fertilize hydrangeas with home remedies
If the soil is not deficient, fertilizing the hydrangeas with simple ones is often sufficient home remedies out of. For example, compost usually contains enough magnesium to meet the needs of hydrangeas.
