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outdoor cannabis growing problems

Outdoor cannabis growing problems

Check out Johanna’s full video series on how to grow weed on Leafly’s YouTube .

What’s wrong with my weed plant?

Inspect under fan leaves, as that’s where some bugs live—such as spider mites—and check where the stalk comes out of the soil, as some bugs live there too—in particular, root aphids.

Too many nutrients

New growers are often guilty of giving their new weed plants too much love. As we’ve mentioned before, it’s called weed for a reason—a lot of times the answer is to just let the plant be.

Outdoor cannabis growing problems

Nitrogen toxicity, on the other hand, is caused by feeding too much nitrogen to your plants and is often referred to as "The Claw." This is because one of the symptoms is the ends of your leaves will curl or claw downwards. They will also turn dark green, which is another sign of N toxicity. To fix this issue, just lighten up on the amount of nitrogen mixed into the nutrient feedings.

Similar to spider mites, aphids hang out on the undersides of the fan leaves, but they are green and have long legs almost like a grasshopper. They are pretty tiny as well so I also recommend using the trichome scope for looking at aphids on your leaves. You will see them crawling around and what aphids do is suck the nutrients and water out of your fan leaves, which causes them to wilt and die.

Nitrogen Deficiency & Toxicity

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Don’t freak out if something does start to happen to one of your plants, as it’s not the end! The best course of action is to view the signs and symptoms on your plant and then compare them to the symptoms listed below. Once you find the right match, continue your research and follow the instructions for how to cure it and within a few days you should see signs of recovery!

Aphids

When overwatering occurs, it means you’ll want to water less frequently. The best method for deciding when to water is by checking how dry the soil is. If it is dry all the way around and inch deep, then it is ready to water.

Outdoor cannabis growing problems

Make sure your grow space is light-proof! (Unless growing an autoflowering strain)

Use caution when attempting to move your grow lights closer, and avoid moving them more than an inch closer in a day, so you can watch the plant’s reaction.

What to Do: Most importantly, pay attention to your plant and watch out for signs of light stress, which will only affect the parts of the plant closest to your grow lights.

If you’ve ruled out problems with watering, nutrients, and pH, there’s a strong chance something with the environment is causing your symptoms.

Step 5: Diagnose Pests (sometimes you never actually see the bugs)

Check for signs of under-watering

As mentioned earlier, good air circulation and a slight breeze is not only good for the plant by itself, but will also disturb bugs and make it harder for them to turn your plant into a home.

Best case scenario is you want to set up your fan system so that all the leaves on the plant are gently rustling, yet no stems or branches are waving around from the force of the wind.

This cannabis was put outside too early in the year, causing it to re-vegetate with strainge twisted growth

If you’re worried about the smell of cannabis, make sure any heated air being vented outside grow room/house gets filtered to remove the scent of cannabis. For example, many growers choose to get a carbon scrubber to “scrub” all odors before the hot air is vented. By creating good suction with an efficient exhaust system and adding a carbon scrubber, you can basically eliminate all smells from the grow room, inside and outside of the house. Learn more about controlling odors from the grow room.

Broad mites are also commonly mistaken for other issues because the bugs are usually too small to see. Broad mites cause twisted growth and shiny, discolored leaves.