Spotting Calcium Deficiencies in Cannabis Plants

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Calcium Deficient Cannabis Leaf

Spotting Calcium Deficiencies in Cannabis Plants

How to Take Care of Calcium Deficient Cannabis Plants

Calcium deficiency in cannabis plants are more common than not, and they are an everyday battle for growers. Especially if they grow indoors as there are certain advantages they do not have like outdoor plants do. Cannabis plants’ soil and water need to be around 6.2 to 6.5 for optimal growth. Going below the 6.2 thresholds will starve the plant of its nutrients while going over might drown it. Maintaining a PH level that’s within 6.2 and 6.5 will ensure the plant receives the calcium it needs. But PH levels can rapidly change from the morning to the evening. So, for people who work the nine to five shift, they will need to be extra thorough on checking their plants.

Warning signs of calcium deficiency in cannabis are color darkening on leaves, brown spots, curled up leaves, small and misshapen leaves, and any irregular marks. Plants that are calcium deficient will essentially rot from the inside out. Stems will start to hollow and break easily. The bud hardly grows or doesn’t grow at all. The roots will also turn brown as well. Mainly, if the plant turns brown and frail, it’s not receiving the nutrients it needs, and calcium is one of the essential nutrients it needs. Magnesium and iron are other nutrient deficiency that plants can have, but calcium is still the most common nutrient that is vulnerable to deficient.

More often than not, calcium deficiencies are found in hydroponic loop systems or indoor plants. Outdoor plants naturally receive calcium from the sun. But they can still be predisposed to calcium deficiencies when the soil is too acidic. The sun helps outdoor plants grow since there is a full spectrum of light it can receive. Specific water sources like distilled water or tap water lack the calcium plants need to develop.

Indoor vs Outdoor

Saving calcium deficient marijuana plants outdoors is much easier than indoors. Soil has more options to change than hydroponic systems since soil can be added to while hydroponic water has to be permanently switched. As said before, running natural water is a great way to stabilize PH levels for the plant and this for both hydroponics and outdoor growing. However, there is a list of alternative ways to equalize PH levels. Dolemite lime and garden lime are easy additions that will help plants receive the calcium needed to flourish. Calcium sulfate can be good too, but it has dramatic swings in PH, so this should only be used by those who know their soil can be overly acidic.

Indoor growing means more attention to detail, either it be hydroponically or not. LED lights used to grow plants do not have the wide spectrum of color needed for the plant to absorb enough nutrients like the sun. In a hydroponic system, there isn’t much more to do besides running fresh water. Which is 7 on the PH scale, to get the plant to stabilize.

Sometimes visuals signs of calcium deficient plants are hard to recognize. So testing the soil’s PH will be a sure way to see if the plant is receiving enough nutrients it needs. A plant can receive too many nutrients, and when it does, it can lead to other nutrient deficiency problems. Your plant can only take so many nutrients at once. So if a plant has too much calcium, it might start blocking out iron. It’s the plant’s way from not overeating. Seeds with weaker genetics need to be watched more carefully, but its hard to determine what seed has strong genetics and what seed has weak ones. Receiving a seed from a friend, it’s safe to assume that the seed is weak. Only when seed bought from a known seedbank can it be trusted that the seed has strong genetics.