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Day 25, 30 days after 12/12 2x400watt hortilux blue 4x105watt 6500k (megalight) (didn't add until day 5 after 12/12) Jan 1: seeds into ocean forest 1 gallon pots, 20/4 lighting Feb10: 12/12 start ~Feb15: preflowers/culling males Mar 1: topped off pots with fresh ocean forest, little extra water...

Today I noticed a white, powdery, possibly "web-like" substance on the top of my soil... Looking at the pics I took last night, it seems it was in one of the pots to a lesser degree. No plant damage (yet...) Anybody know what this is? In addition to the 800x600 attachments, 2 sets of 7...

17 days old, front two rows are nirvana afghani, back two are nirvana northern lights... 2x400w hortilux blue Comments/criticism welcome. Bonus points if you can tell me what might be wrong with the plant in the last three pics.

would like to start bubbling my nutrient solution for aeration and ph, before I apply to soil. Just bought the equipment... question is, bubbling for 24 hours, should I use the airstones I bought or would it be more efficient to just put the air tube to the bottom of the res? is there a benefit...

I snipped a 9 gram sample and cut it into smaller pieces. For quick drying, where do you think would be best? I don't want to completely ruin it with the oven or microwave, but I can't wait a whole week for air drying either. My house is 69F/40 humidity today.. 1. On my DSL modem (+10deg...

can someone please clarify the purpose of watering then covering a plant before a frost? I assume you are increasing the water volume, therefor making it take longer to freeze. But the covering? Is that to keep heat in?

I'll be wiring my new reflector/sockets to my ballasts this weekend - do I need to use special tape and wirenuts because of the heat (both 400w mh)? I have walmart wirenuts and 3M Utilities and Telecommunications : Scotch® Super 33+ Vinyl Electrical Tape - do I need better supplies? Am...

Are there any circumstances where leaves, after becoming chlorotic, will repair themselves or do they pretty much stay that shade until death? Like if you have a ph or nutrient problem which caused some lower nodes to yellow can you expect them to turn green again if corrected? Or does it depend...

Outside, 2 weeks or so into flower, 5 feet tall. I am using metanaturals base+bloom, twice a week. I have interveinal chlorosis, 4 fan nodes from the bottom, 1 fan node has died off already. Can fungus gnats cause this (saw little white bugs when watering/looking into seriousness)? Maybe...

I had some 2" plants, unknown strain, grown inside that I put outside 8 days ago. They had no flowers visible to the naked eye then, and now I have some I think are male. What is the soonest a male could release, after starting 13/11 for flowering? I know one can't be too scientific about it...

am I crazy to try to do a small outside grow this late at 35N latitude? The seedlings already have 4 leaves so it's not like I haven't started.. I just didn't want these guys crowding my 2 footers inside. I could just scrap them if it is not worth the effort.

So if I have a glass lense in my reflector, am I just loosing some energy to reflection or is the actual light/color spectrum changed?

My question is about shell fragments which have not dropped from the cotyledon after breaking the soil surface... I have read that it is recommended to remove the shell gently asap... My question is: what is the film that I am pulling off (between cotys and shell) - is this some kind of food...

First anyone ever seen a seedling with three cotyledon? It is one of about 10 same bagseeds and I can see it is starting to throw out its first leaves. I am at a loss as to how a dicot seed can have three - has this happened to anyone else?

in an enclosed, air-cooled reflector, does the tempered glass cause any significant light loss/distortion?

I have had my seedlings in 16 oz plastic cups for about 2 weeks now - all have upwards of ten leaves I am wondering how long they can be kept in 16 oz w/o stunting their growth, for what its worth, they are already suffering from various nutrient defs from the crappy MG organic soil... (don't...

I was intrigued by babygro's explanation of PAR wattage in the CFL vs HID title fight thread - as well as someone's (perhaps babygro again) insinuation that flouro light is "higher quality" than HID. So I am finishing seedling stage and about to purchase lights for the veg phase; I have...

from someone who is sure: are water droplets on seedling leaves beneficial other than for the passive purpose of strengthening stems? I can't decide if the droplets act as a magnifier for light, or a reflector. If they do serve as a magnifier, is the light they magnify just the human visible...