Jack the Ripper is ready for harvest in 8-9 weeks after in is put into the bloom stage. It produces an above average yield. It will a little more than double in size in its first 3 weeks of being in the bloom stage. The buds grow like a haze strain and start frosting up quicker than most strains. Jack the Ripper will get large indoors and out if you give it enough veg time. It does well under a screen and will do a good job of filling in all the spaces, provided you have just a little experience screen training.
Jack the Ripper is a strain that can handle a good deal of nutrients in the veg and bloom stage. You would want to build up to it but JTR has no problem handling up to 1800 ppm of most brands of nutrients in the bloom stage.