Cannabis Cultivation

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This will be a home for all things related to the cultivation of cannabis. The preferred focus here will be organic and sustainable growing methods, but any cannabis growers or growers-to-be are welcome!

The moderator and community creator here is in a legal cannabis state. It is therefore assumed that everyone sharing photos and info about their grows is also doing so legally. If you're not, then keep that to yourself. Any mention of actively conducting a cannabis grow illegally will be removed. This is to protect our instance admin, and will be a zero-tolerance policy.

Happy growing!

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First time grower, getting flowers but also lots of yellow leaves. Tips? (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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Hi. I have two plants I've been growing all summer on my back patio. One is a Trainwreck, the other it either Trainwreck or Lamb's Breath. I am not sure which is which.

The plants have grown pretty well all summer, are about 5.5 feet tall, and are starting to flower. One especially, the other only has a few little spindly guys at the nodes.

Anyways... I've had a few yellow leaves and just yanked em off all summer without too much worry. Now though, with all the flowers budding, I am seeing a ton more yellow leaves and it's making me worry.

I am using fish fertilizer and have been applying once a week.

Should I add anything else? Should I not worry about it? My regular gardening knowledge says the plants need nitrogen but I'm afraid to use any other fertilizers since I've killed cannabis plants in the past this way.

Edit: Pics https://imgur.com/a/AxTyRF3 https://imgur.com/a/tEjYJSF

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[–] [email protected] 3 points 1 year ago

You might be adding too much nitrogen? I wonder if adding fertilizer every week is giving them nitrogen burn. Maybe post a picture of the leaves and someone might recognize something.

[–] [email protected] 3 points 1 year ago* (last edited 1 year ago)

EDIT #2 ok, after seeing the pictures, it doesn't look pH issues. They look like they just need more food. You should be able to increase the frequency of that fish fertilizer to help give them a boost of nitrogen, but now that they are flowering, you'll want to add or switch to something that has more phosphorus and potassium.

~~Pictures would help, as well as a bit more info on your growing media.~~

~~However, looking at the fish fertilizer you linked, it's very acidic. It's likely the pH has gotten too low for the plant to take up it's nutrients.~~

~~Edit: there are lots of garden lime products you can add to raise the pH. Some will take awhile to work, some are faster acting. You can also add oyster shell flour for a similar effect. Wood ash would be the cheapest fix, but it's also very easy to add too much.~~

[–] [email protected] 2 points 1 year ago

I haven’t grown any plants yet so take this with a grain of salt, but they almost look sun burnt. We had a pretty big heat way and a several of my garden plants had leaves that looked like this.

Especially since it has been persistent all grow it would make me think it’s a sun issue, maybe they’re getting too much sun where they’re at. Again I haven’t grown any cannabis yet so I am not nuanced in there but maybe a thought that might help.