Cannabis plants “count” the hours of the night period, so it’s most important to make sure the night period is at least 12-hours long (longer is better than shorter for night periods). 2.) Maintain Proper Temperature Through Flowering Stage. Maintain a comfortable temperature in the flowering stage, between 65-85°F (18-30°C). Avoid big temperature swings – temps should be slightly cooler at night than during the day.
Don’t let the plant (and their roots) sit directly on a cold floor. Always use “hand-test” to make sure it doesn’t feel too hot in the top canopy of buds under the light. Put one of your hands (palm facing down) under your grow lights where the top of your plants are located and wait 10 seconds – if it feels too hot for your hand it’s too hot for the plants! Be careful of cold drafts at night in cool climates during the winter. 3.) Don’t Give Your Plants Too Much Light (Light-Burn) While generally more light is better for your cannabis plants, very high power brightness can light-burn your plants, which stresses plants, causes unwanted bleaching, and can trigger the plant to hermie on you. With high power LED grow lights and big HID lights, make sure to always follow the manufacturer’s specifications as far as the minimum distance from the top of the plants!
Don’t keep your lights too close because even if the heat is under control, too much brightness can cause stress too. Light-burn is only common with high power LEDs (3W chipsets and bigger, x-lens technology, COBs, etc.) and big HIDs or perhaps multiple smaller HIDs (usually with an intense cooling system). It is more difficult to “light-burn” your plants with fluorescent lights, CFLs, smaller HIDs, etc. – with these lights, you only need to worry about heat. High Power LEDs or HID Grow Lights Will Light-Burn Plants When Kept Too Close (yes, even if the temperature is completely under control) 4.) Prevent Major Plant Problems. Major stress to the plant can cause the plant to react in unpredictable ways, including producing bananas and male pollen sacs. Major stresses include… Nutrient Burn – given too much nutrients. Total leaf loss (usually as the result of overzealous defoliation or bugs) Any other huge stress to the plant. The plant pictured to the right was subjected to cold temperatures and then grew directly into the grow light, putting it under a lot of stress. From the grower Saberabre: “So I left this girl (or what I thought was a girl, notice the pistils at the bottom calyx) over the weekend and came back to the plant up in the light getting burned. I’m not too sure what happened here but it got pretty cold the last few days. I think it’s a hermie…” A few days before this pic, the plant was just showing a few white pistils and appeared to be female. After the stress that it went through, the grower came back to a plant that was completely covered in male pollen sacs, with the first few white pistils being the only sign of this plant is female. Hermaphroditism and mixed-sex buds seem to be more common when growing plants from bagseed (seeds that you find) or seeds from an unprofessional breeder. The reason is that seedy buds are worth less than sinsemilla (unseeded buds). Therefore, if you find a seed in your bud, it likely was the result of either bad growing practices (male plants weren’t removed in time) or due to some type of problem (plants were stressed and self-pollinated, which means the next generation is most likely to do so). When you’re buying seeds from a trusted breeder, they go to great lengths to prevent unintended pollination, and they specifically select for plants that don’t ever show mixed-sex traits. And remember… even if you do everything right, sometimes you will run into hermie plants – it’s just a fact of growing. Sometimes these things just happen, for example… “I’ve always felt like seeded weed was not nearly as potent as sinsemilla and I do everything in my power to kill all males! Cannabis is so sneaky, though – last summer we had such wild weather that even a couple of clones turned out some male sex parts.” Experienced outdoor grower. When both female and male flowers are in bloom, pollen from the male flower lands on the female flower, thereby fertilizing it. The male dies after producing and shedding all his pollen. As the seeds are maturing, the female plant slowly dies. The mature seeds then fall to the ground and germinate naturally or are collected for planting the next spring. “Unpollinated, female cannabis flowers continue to swell and produce more resin while waiting for male pollen to successfully complete their life cycle. After weeks of heavy flower and cannabinoid-laden resin production, THC production peaks out in the unfertilized, frustrated sinsemilla!” Plant Symptoms.
You can use our tool to filter by symptom and help diagnose your plant. For a cultivator it´s vital to recognise the signs of hermaphroditism in a plant, as it can ruin a home grow. A hermaphrodite plant is one that develops both feminine and masculine flowers. This process is not exclusive to cannabis and is actually quite common in nature.
The result is that the quality and quantity of the final product are influenced by the production of marijuana seeds. To detect these changes in time, the plant should be inspected frequently to identify changes that may be a symptom of hermaphroditism. These inspections should be done particularly regularly during the start of the flowering stage. There are two main causes for this phenomenon: The genetic inheritance of the plant on the one hand, and environmental issues on the other.