HL is spot on. So long as it doesn't burn your hand. To close and you will run into some light bleaching so don't freak out. Are you going back to the 600 hps for flower??? If so your probably going to need that 12" to 18" with out an air cooled hood. The only sure way to tell is after you flip.
Don't wait to long to flip. If its Sat dom strain it will go freaking crazy the 1st 30 days of 12/12. If you haven't seen a sativa stretch then your in for a surprise.
just remember for the first 2 weeks of 12/12 to continue your veg nutes. Start working your E.C. up in those 2 weeks near your final EC. Stating the 3rd week 12/12 you should be near the top of your feed schedule with bloom nutes. Maintain your basics and you will be good. Watch for plant stress as you bring nutes up. expect some leaf flip but if the tips start curling under and burning off lower your feed schedule.
That's about it brother.
I think your well on your way to a nice harvest!!
Holler if ya need anything .
Peace
GT
Don't wait to long to flip. If its Sat dom strain it will go freaking crazy the 1st 30 days of 12/12. If you haven't seen a sativa stretch then your in for a surprise.
just remember for the first 2 weeks of 12/12 to continue your veg nutes. Start working your E.C. up in those 2 weeks near your final EC. Stating the 3rd week 12/12 you should be near the top of your feed schedule with bloom nutes. Maintain your basics and you will be good. Watch for plant stress as you bring nutes up. expect some leaf flip but if the tips start curling under and burning off lower your feed schedule.
That's about it brother.
I think your well on your way to a nice harvest!!
Holler if ya need anything .
Peace
GT