hey ppl ive been growing 4 northern lights x shiva for 3 weeks now. i started in 4 inch pots then transplanted after 2 wks to 7 inch. are the pots ok to finish in? i can already see roots in bottom of pots cheers
Hiya Skintight
You're going about things the right way - starting in small pots and potting up in stages as the rootball develops but you'll need one more stage before you can put it into flowering.
Ignore the 1 gal per month and per foot of growth, they're just simple rules of thumb and irrelevant to what you're doing, particularly as you won't be repotting in flowering or growing a plant any taller than about 3 foot.
Let the plant root out it's current 7 in pot, so leave it about another week and then pot up to a 2-3 gallon container which would be approximately 10-12 inches in diameter and about 12 inches high. Let it root out this pot for about 1-2 weeks and then put it into flowering.
What you want ideally is for the root mass to root out the 2-3 gal pot but not completely, so there's still a little more room for root growth when the plant enters flowering as for the first 2-3 weeks of flowering root growth continues but it slows down after that point and starts putting its energy into flower and bud formation.
So what you're shooting for is as a big a root mass as you can get in the final pot, the bigger the root mass the higher the levels of nutrients the plant can uptake and theoretically this will also allow the plant to produce the biggest yield possible.
Good luck with your repotting and grow.