Hydrangeas need sufficient magnesium for he althy growth. If there is a magnesium deficiency, the administration of a suitable fertilizer is essential. In this article you will find out which symptoms you can use to identify a deficiency and how to remedy it.
How do I recognize and treat magnesium deficiency in hydrangeas?
Magnesium deficiency in hydrangeas is manifested by stunted growth andyellowing of the leavesThis limits the plant's photosynthesis. By fertilizing with Epsom s alts you can counteract the deficiency and support the vigorous growth of your hydrangeas.
Why do hydrangeas need magnesium?
Magnesium plays an important role in thehe althy growth of hydrangeas. They need the mineral in order to carry out photosynthesis efficiently. In addition, magnesium controls the activity of many enzymes in plants (and in humans too) and contributes to cellular respiration.
Why are hydrangeas often affected by magnesium deficiency?
Themore acidic a soil is, the less magnesium it usually contains. At the same time, plants are less able to absorb nutrients when the pH value is low. Since hydrangeas prefer acidic soil, fertilization with magnesium plays a particularly important role.
How do I recognize a magnesium deficiency in hydrangeas?
If there is a magnesium deficiency, hydrangeas produce less chlorophyll. Yellow leaves, a so-called chlorosis, are the result. The discoloration first appears in the center of older leaves and then slowly extends to the edge of the leaf. The leaf veins usually remain green. This deficiency symptom allows a magnesium deficiency to be clearly distinguished from an iron deficiency, in which the yellowing first appears on the edges of the leaves and then progresses towards the center.
Which fertilizers for hydrangeas contain magnesium?
The quickest way to counteract a magnesium deficiency in hydrangeas is to fertilize them with Epsom s alt, which is also often used on conifers. But kieserite and dolomite also contain a particularly high magnesium content in order to quickly remedy the deficiency.
When do hydrangeas need magnesium fertilizer?
You should start fertilizing with magnesium at the latest when your hydrangeas showclear signs of a magnesium deficiency. Many gardeners also use magnesium fertilizers such as Epsom s alt preventatively. However, before you fertilize with magnesium if you suspect it, you should carry out a soil analysis in order 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 home remedies is often sufficient. For example, compost usually contains enough magnesium to meet the needs of hydrangeas.