(Mineral city, Ohio)
My first garden,seedlings came up were transplanted to my main system with my soultion mixed mild according to your chart all is well.When do I change my soultion for the various stages Also light changes I have may metal halide on for 18 hrs a day now when do I start the sodium and when do I cut back to 12 hrs.
Thank you,Your site is very helpful out of all the sites I have visited I like yours the best
Answer from Stella:
On this page, it tells you when to change the mixture of nutrient solution used:
Early mild growth is approximately when the plants go from newly transplanted to 6-8" tall, just rule of thumb
Aggressive vegetative growth is when the plant really starts growing tall and bushy, lots of leaves
Flowering and fruiting is self explanatory.
As far as lighting, ideally:
For growth stage: 14-16 hours of MH light, followed by 8-10 hours of darkness.
For flowering and fruiting stage: HPS 12 hours on and 12 hours off.
Hope this helps!
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