2nd timer, super slow growth, day 35 from seed

Soil; some sort of pre-mix, your choice. Distilled water, 5cc cal/mag per gal. At least 600w incandescent light. Focus on the basics. They don't need to eat until they're ready to show their sex. (You can argue, but good soil to start, and you can't mess it up). Water very little when they are young, but keep the top of the soil moist. They will drink more as they get big, but pay attention to the weight of the bucket and their leaves. Light bucket+ limp leaves = water. Always pH everything, or you're fucked. If you don't pH, don't bother asking "what's wrong with my plants", because it's pH. If you don't pH, you're....... That's right, fucked. Good soil to start, distilled water plus cal mag, good light.
When they sex, give nutes (half-strength) and watch. They shouldn't burn at this age, at that strength. Watch how they respond over the course of a day or two. Learn when to water, when to feed. Then, go nuts trying to maximize your yield, or make her smell amazing, or turn her buds blue. Best of luck to you:-)

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