Jack Herer is ready for harvest in 8-9 weeks after in is put into the bloom stage. Like most strains it will doulble in size in the first 3 weeks of the bloom stage before it stops growing and focuses it's energy towards bud growth. It is a very good strain for growing under a screen although it has a traditional growth pattern. It is a medium sized plant and will not get more than 10 feet tall outdoors even with a long vegetative time. Although it does not get very large it is still an above average producer.
Jack Herer can handle a good amount of nutrients in both the bloom and the vegatative stage. It can at least handle 1800 ppm's of most nutrient brands although as with most strains you should work up to that high of a nutrient concentration.