What Causes a Calcium Deficiency?
Calcium deficiency macro of leaf.
There is a wide range of issues resulting in a mild to severe calcium deficiency. If the growing medium is too acidic or less than 6.2 pH, the result is often calcium being locked out by the plant even when enough calcium is present. Other issues include:
- Other nutrients can be locked out due to an excess of calcium
- The plants are being fed with either reverse osmosis or filtered water
- Plants grown in soil with no calcium supplementation
- The pH level is too low
- There is not enough calcium in the tap water for specific areas
- Plants grown outdoors in acidic soil with a pH level under 6.2
- Cannabis grown in coco coir or hydroponics without the supplementation of calcium
How to Fix a Calcium Deficiency in Plants
- Make certain the pH level is correct for the specific growth medium
- pH water should be used to flush the entire system
- Use a calcium-magnesium supplement
One of the key reasons for a calcium deficiency in plants is the pH level at the roots is either too low or too high. When the pH level of the root zone is not correct, the plants are unable to absorb the necessary calcium at the root level. The most important step is testing the pH level for the specific growth medium. When the plant is grown in the soil, the roots need a pH level between 6.2 and 7.0.
If there is a calcium deficiency, the pH level should be as close to 7.0 as possible. This is because the roots can absorb calcium at a higher pH. If the level is not a minimum of 6.2, the roots will be unable to absorb much calcium. If hydro is used as the growth medium, the recommendation is keeping the pH level between 5.5 and 6.5. Once again, the higher levels are recommended for efficient calcium absorption.
Learn how to fix a calcium deficiency in plants. Know what calcium deficiency symptoms look like in tomato plants and how to treat in weed plants.
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