Here you go......
Why Is Cal-Mag Deficiency So Common in Weed Plants?
If you frequent cannabis growing forums, you’re likely under the impression that calcium and magnesium deficiency is an epidemic. Almost every picture of a discoloured leaf and withering plant gets a reply of “just hit it with cal-mag, bro”. While this deficiency certainly causes issues in many growing operations, in some circumstances, adding it fails to address the root cause of the issue.
Cal-Mag Deficiency Is a Controversial Topic
Calcium and magnesium deficiencies certainly exist in cannabis, but this hasn’t stopped some growers from taking the hard-line position that it doesn’t. Rather than blaming a lack of cal-mag in soil, they blame environmental variables instead, including poor pH management and an excessive application of other nutrients. If you’re sure that you’ve dialled in your pH and haven’t swamped your plants with potassium, they’ll benefit from a dose of cal-mag.
The Symptoms of Cal-Mag Deficiency in Weed Plants
So, what exactly does a lack of calcium and magnesium look like? Whether your growing medium genuinely lacks these elements or your pH levels are to blame, you can expect similar symptoms. Check out what
calcium deficiency and magnesium deficiency look like during each stage of the growing cycle.
Signs of Cal-Mag Deficiency During the Seedling Stage
Plants are extremely vulnerable during the seedling stage. Any sort of deficiency or disease at this time can send plants off on a negative trajectory from the start. The signs of a cal-mag deficiency during the seedling stage include:
- Stunted growth
- Yellow and brown discolouration of leaves
- Weak stems
- Leaves that curl upward or downward
Cal-Mag Deficiency Symptoms During the Vegetative Stage
Cannabis plants put all of their energy into photosynthesising and packing on size during the vegetative phase. A lack of cal-mag during this time can inhibit this process, leading to underwhelming results down the line. Look out for these signs:
- Brown or yellow spots or edges on leaves
- Slow rate of growth
- Crispy leaf tips
What a Lack of Cal-Mag Looks Like in the Flowering Stage
Because calcium and magnesium assist in protein synthesis and energy capture, they are vital during flowering formation. A deficiency during bloom with give rise to the following symptoms:
- Brown and yellow spots on buds
- Brittle leaves
- Small and loose buds
- Small yields
Cal-Mag Deficiencies: Know the Signs and Act Accordingly
You just upgraded your cannabis cultivation knowledge! You’re now aware of why calcium and magnesium almost always occur as a pair in plant supplements. You also know why these elements are so important for plant health, and what the signs of deficiencies look like.
So, before you start pouring cal-mag onto your weed plants, remember to make sure that your
pH is within the proper range, and that you’re not adding too much potassium to your growing medium. If everything checks out, then add cal-mag, and watch your plants bounce back in style.
stash..been told it’s a real leg opener..@tobh grew this out and they were humugus .would b a perfect candidate for your grow style slg ..they are regs but..Jeff should make some fems of these.. 
for being a control freak. He's on a much higher level than many of the good growers, except he does it with people
.oh the back middle plant has the tennis ball smell .lol.it’s pretty wicked..she was the runt of the litter too but I kept a cutting off her and the front 3..I was going to run these nxt but have decided not to as they all aren’t on even terms ,also will wait till my mates have a few cones of the plants before deciding which one(s) to keep.
