This is my only plant in hydro. I am going to kick her into 12/12 under HPS today. When do I change her solution? Right now she is in pureblend progrow. Do I wait about a week or two into flowering or do it now?

Wait at least 7 day's before you change the nutrients from veg to flower. It takes the plant that long to switch it's cycle for most strains. It could take 10 day's for others but changing out the nutrients in 7 day's is very safe and will show no shock to the plant.

__________________
Peace
Zandor

If you go cheap you grow cheap. - Me

Thanks, will do. One more question. I will be using Tiger bloom. On the bottle it says, 2-3 tsp per gallon. Should I dilute it to half or quarter strength?

no not really. The nurtient formula is made for this plant so cutting back by 1/2 is only giving them 1/2 of what they may need. Watch your plants they will tell you how you are doing.

__________________
Peace
Zandor

If you go cheap you grow cheap. - Me