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Grow Q&A: My Pot Plant Won’t Flower

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Hello, I'm a first time grower, long time reader. I've recently started growing my own cannabis, and I just can't seem to get my plant to flower. I don't have it in the best growing conditions. But it has been growing now for four months and it just keeps getting bigger. It's about 5 foot right now. I have little red hairs growing out all over the plant, but only where the leaves grow out. Maybe it's a male? If so how do I check. I've watched numerous videos on determining the sex, but I just don't have any other suggestions on why it's not flowering yet. – Danielle D.

Dear Danielle,
Cannabis plants flower when they receive 12 hours of light and 12 hours of uninterrupted darkness per day. Either your plant is getting too much light or the dark time is being interrupted with light.

You didn’t mention whether your plant was indoors or outdoors but I’m going to assume from the time frame and size that it’s growing outside. If that’s the case, then you need to use the light deprivation technique to cover your plant with a dark tarp for 12 hours per day. If indoors, you need to set your growlight timer to turn off for 12 hours per day.

The indication of red hairs makes me think that your plant is a female. If it was male, you would be seeing tiny spikes sticking out from the nodes where the leaves meet the stalks. Eventually, these spikes will grow into yellow male flowers that resemble tiny bunches of bananas hanging downwards.

Have a grow question? Ask away at deardanko@hightimes.com

Photo by @DannyDanko

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