General Questions

High all, first post and first-timer here.

Encountered many problems as is customary for first timers, the worst of which was vegging for far too long and producing ~140cm plants in a 2m tall growspace. Erk. The most pressing issue presently is the fabled mites, which are being subdued somewhat by spraying a commercial pyrethrum solution.

My question to those who've used the product before is how much spraying is too frequent? How often can one spray without damaging the plants?

Secondly, a question for future reference- say I have an area which would be covered by 2x 600w HPS with a light distance of 40cm (as per Dr. Cervantes' chart), is it of beneficence to add a third? More light, more production? Or does ones growspace limit the production wattage to a specific useful amount?
In light of these gangly wall babes I'm considering the following next time-

- Veg to 25cm, top em down to 16-20cm
- Veg up to 30cm, supercrop at the node above the middle node
- 12/12 once stems have started repairing (3-5 days)

What do you think?

Looking forward to acquiring a cam, starting a fresh diary in a few weeks.

Also, if anyone fancies sharing some of their favourite threads, that'd be great.

Thanks in advance, and good to be here!

Some say you can just keep adding light with advantage, but obviously there is a point of diminishing returns. Try it with 2 first.