-Don't overfeed or overwater your plants. With autoflowers, you don't need to give them full nutrient regimens. Go with 1/4 of what your nutrients say to use at around week 3 and don't feed it anything before that. they have all the food they need for the first few weeks of their lives.
-Try to figure out the best height for your light with this run. start with it about 24" above the plant and if it doesn't grow as tall as you would like it to grow, move it up some more. If it starts stretching and getting floppy branches, move it down. It'll take adjusting to figure out, but it's worth it in the end.
-Cultivars(strains) and phenotypes are all different and that's not a bad thing! Some will like more intense light and nutrients, some won't. Each cultivar you grow, you'll have to figure out the sweets spots of light intensity, temperature, relative humidity, and nutrient regimen. It seems like a lot, but it really isn't.
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I hope this helps!