I just went to the Naval Observatory website, entered my city and state and had it calculate my local sunrise and sunset for the year. If I start clones or seeds in veg today, a month from now would be the first day of winter, which is calculated to have 9 1/2 hours of daylight. I will gain a few minutes of daylight a day every day after that, reaching 12 hours by March 22.

Has anyone played around enough with lighting to know if that's enough to get cannabis to produce bud? Usual winter daytime temps in the sunroom are 60's to 80's, depending if the sun is out, with nighttime temps dropping into the 50's or high 40's.
StoneMeadow Reviewed by StoneMeadow on . Can a seedling grow in a 12 hour light period? I live in AZ, and the temperatures are perfect for growing right now. The only problem I face is the 12 hour light periods, since we're in winter. Could the seedlings grow in a direct sunlight, well lit place for only 12 hours? Thanks for any help :) Rating: 5