AMS XTRM is one of the most stable strains to grow, so if you are looking for your first strain, this is the one. You will be able to raise this feminized strain without any problems. It has long-fingered leaves and the dense, sweet bud formations appear light green due to the frosty resin coating. AMS seed needs 9 to 11 weeks before you can harvest. Don’t harvest too soon, because the desired sticky resin will cover the buds in the last 3 weeks.