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grow big instructions say to feed every other watering. It's good to start out with less, but you have to taper it up, and if you are only watering twice in 21 days I'd say you are using pots that are too large. Though the plant itself doesn't mind more room, controlling moisture and nutes...

I haven't been over there when the lights are on in a few days (should make it down tonight), but last time was when I took pictures last I think. It's doing well. It's going to be a month after the lav/bbs and purp kf, and the buds seem to be developing slower than on the KF. I had to top...

it depends on where you live. Humid there, then you don't want to vent to the attic. In fact, if you want your house to last a long time, consider venting the attic :) In dry climates it's no problem, in fact in really dry climates they suggest you run humidifiers to prevent houses from...

ph is high. nitrate is a soluble form of nitrogen, so it's the N in NPK (P is phosphorus, K is potassium). Sodium isn't great, ok trace minerals (calcium and mag mostly, would be surprised if there weren't iron, I suspect they aren't testing for it). I have no idea if/what flouride or sulphate...

Orange Crush yield was 26.4 grams. We estimated an oz, so not too bad. Going to let a top cure a little longer before doing a smoke report. Lav/bbs should be ready by the 9th, and the purple kf should be ready by the 16th.

you had it right the first time. lumens per watt hid actually loses, however watt for watt they win (though this is really a bastardization of them being point sources :D) To the OP, as a primary light, hps has disadvantages in veg. Supplementing them with blues in the 6000k range is ideal...

use flower nutes in flower, and veg nutes in veg. Also make sure you're following the instructions. If you have roots coming out the drainage holes into the carpet you have something wrong. It shouldn't be moist enough for that, and if the roots are that motivated to get out their are either...

keep the cfl's on them as well imo. Lack of blue spectrum causes stretching, and hps lack blue spectrum.

kind, dank, chronic, headies. way more, those are just off the top of my head...

yeah, the UFO isn't going to make up the difference imo. You'd be better off with the 600w. My impression of UFO's is that they are more spotlights than primary lights.

if you don't have money to blow, you are correct, but you are incorrect in saying you can't get HID replacements in LED's, regardless of phase. It will cost you 4-10 times as much (and you have to weed through all the crap out there trying to rip you off), so for most of us it's prohibitively...

dunno on the others, but you are correct about chemdog. It's one of the strains with an interesting history, and worth doing a little research on :)

brick top just made a good post related to this in another thread about getting purples. This is probably the best info you're going to get on your question :) https://www.rollitup.org/advanced-marijuana-cultivation/393581-purple-sativa-more-purple.html#post5053846

can be genes, and can be environment. Genetics has nothing to do with sativas specifically, though one of the original purple landraces was a purple thai sativa. Anyway, try doing a search for grandaddy purp or related terms on riu. Within the last week there was a thread with very detailed...

even the bud on a plant doesn't ripen at the same rate.

0 to ~40, all depends on size

why duplicate threads all over forums? Start one in the right place and get a real discussion going...

I posted something in the other thread where you ask the same question... It's usually not considered good form to copy a post to multiple forums, pick the correct one and go with just that one :)

size of plants, and related info would help a lot (like veg time). Pics can help more experienced people identify things you might not recognize, but could point to issues. Yield is based on multiple factors, the two most important in my experience being plant size and strain, but there are...

yep, I run this way. Sucking air is sucking air, with two caveats. The CFM will be reduced by the light, so if you are looking for very specific CFM's in turnover, you will need to accommodate for the extra ducting. Also the cooler the air going into your light, the better it will be cooled...