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NAG420 started grow question 3 years ago
I have brown spot on my leafs and the but new growth is looking good doesn’t look like anything I have experience when I touch the tips of leaf it crumbles just watered yesterday.
1st AutoFlower
18 weeks
1st AutoFlower NAG420
Critical Purple Autoflowering
8 comments · 2 years ago
Week 4
Leaves. Edges burnt
Hellishjam answered grow question 3 years ago
Thinking it could be boron deficiency. The first signs of a cannabis boron deficiency is abnormal or thick growth tips along with brown or yellow spotting on new leaves.With a boron deficiency, upper cannabis leaves display abnormal and/or slowed growth. Growing tips may not grow properly, may display twisted growth, and may die off. New leaves may wrinkle or curl.

Plant roots can also be affected by a boron deficiency, showing unhealthy or slow growth. Stems may become rough or hollow. Boron deficiencies are more likely to appear when a plant is underwatered or experiencing very low humidity (very dry air).

A plant with a boron deficiency may look like it has a calcium deficiency because boron is needed for the plant to properly use calcium. New growth is affected the most, and may look like it’s been burnt or scorched. A boron deficiency is often accompanied by an apparent potassium or nitrogen deficiency, as these nutrients are needed for the plant to use boron.
Removed answered grow question 3 years ago
Looks like a calcium deficiency combined with light burn/heat stress. Calcium helps your plant deal with heat issues. Hard to say from sure from the picture but it look like there is bleaching on the top bud sites and clawing of leaves. I would raise your light to 18 -20 inches and see how she responds. Happy growing!!:four_leaf_clover:
LongJohn420 answered grow question 3 years ago
Hi! Sounds like calcium deficiency add some cal-mag and you be good! Also about's better to give like 1/2 what the bottle says. Much easier to take care of underfed plants.
Happy growing!