Magnesium deficiency: Clues and cures
from Grower Talks
Magnesium is the central element in chlorophyll, making it a crucial nutrient for maximizing photosynthesis, as well as maintaining vibrant green foliage. Like calcium, magnesium is required by plants in large enough quantities that it's not considered a micronutrient, but rather a secondary nutrient. Only nitrogen, phosphorus and potassium (N, P, K) are needed in larger quantities by plants.
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