Question: What do I do if the edges of my leaves are all curling up? I’m a first time marijuana grower and just noticed this happening to only two of my plants.
Jay Kitchen and Uncle Tweezy: First I’m going to give you a qualifier—we don’t really have enough information to give a you a specific answer. That’s because we don’t know some of the basics about your grow operation such as how far along your plants are, how many you got, what size containers they’re in and so on. But there are a number of reasons that your leaves could be curing up. So we’ll shoot from the hip and try to help you out, know what I’m saying.
It could be that those two plants might be root-bound, or maybe they could have inferior genetics or the seed could have been kinda icky. We’ve seen a lot of Sour strains that have leaves that just taco-up with really sharp edges. I don’t know if that’s your problem, but then again we don’t know what strains these are.
Marijuana leaves curling up, but no discoloration? You could be over-watering the plants or applying too much nutes. There could also be a mineral imbalance, or calcium imbalance. How close the plants are to the light source could be causing the problem.
Grow guru Ed Rosenthal talks about a lot of the reasons why marijuana leaves curl up and so does Jorge Cervantes—you should check out their stuff if you need more in-depth information. But if the leaves aren’t discolored or dropping off just flush and see what happens after a week or ten days. Since you’re a first time grower you may be over watering those plants a little bit, or adding too much nutes, or they may be root bound. When in doubt, though, flush it out. Flush your plants with plain water and then you can begin again.
And definitely make sure your plants don’t stay in the same container too long because after a while you’re going to start seeing leaf curling and other leaf anomalies. Also be careful if you’re going organic—make sure your products are really organic, not organic-based. A lot of companies claim that their products are organic, but they’re not really organic in the sense that they don’t have chemicals, salts or edta’s.
Keep those questions coming! All of our love from The Kitchen!
Jay Kitchen and Uncle Tweezy
To answer all your cultivation questions we’ve teamed-up with experts Jay Kitchen and Uncle Tweezy, authors of The Kitchen presented by Uptowngrowlab—an oversized, hard-covered, coffee table book that’s 50% grow guide, 50% adventure story and 100% awesome.