Coffee grounds be added to a compost heap as a source of carbon and proteins. Adding them to growing medium has little or no effect on growth...something I found out myself. The only benefit from coffee grounds, I found through numptiness, was that infestations (spider mites in this case) prefer plants growing without coffee grounds in the soil. However, there is no real reason to suggest the coffee grounds had anything to do with it.


How about placing plants into darkness 24hours prior to harvesting?
I personally don't go with this anymore because...well...how much growth do you expect within 24 hours?
I prefer to just crop at the end of the day after a week or 2 of watering and dry out over 1 or 2 weeks.
Is this wrong?


Pink.