Need Help with my AG grow(plants have brown spots)

This is my first Ag grow so im pretty new at this. I have 3 plants in my ag as of right now, 2 of them seem to be healthy. The one with brown spots doesnt seem to be dying, the stem is still hard and sticking up. The temp in the room is 75-80. I fed It its first growing nutrients a couple of days ago. Can anyone tell me what im doing wrong?

prob from feeding to early. that last pics looks troublesom as it is the new growth that is yellowing, correct? ur ph has got to be off a ton or you gave her way too much nutes to early. flush that res

I agree with smokey...you PH is probably way off....get it between 5.3 - 5.8. I have an AK-47 in a AG right now and feed it nutes from seed. Im glad I only planted one because after 30 days of vegging it filled up the whole space...there is no way you can do 7 plants on that thing...lol.. I used fox farm grow big and just the lights that came with it and now its a 16' bush flowering under a 400HPS...

have fun with your AG....FLUSH OFTEN and KEEP AN EYE ON YOUR PH

Lol thanks for the advice. like i said im new at this so i dont have a ph tester. im not even sure where to buy one or how much they are. In the first pictue its the only one i sprouted outside nd the rest i did in the AG, idk if that makes a diffrence but it looks better the the other 2. heres some updated pictures. and what did you mean by flush? the last picture; there was a light patch of green on the foam, im not sure if its algi but i cut the top part off.

man u need to test that ph asap if you want themto live. go to walmart- they have ph kit for like 12.00.

risexwithxfallen said:

Lol thanks for the advice. like i said im new at this so i dont have a ph tester. im not even sure where to buy one or how much they are. In the first pictue its the only one i sprouted outside nd the rest i did in the AG, idk if that makes a diffrence but it looks better the the other 2. heres some updated pictures. and what did you mean by flush? the last picture; there was a light patch of green on the foam, im not sure if its algi but i cut the top part off.

Click to expand...

FLUSH means changing the water in the resivoir. you need to do this at least every 2 weeks....but I find that the aerogardens res is pretty small so you need to do it every WEEK! go to wal mart...find the pet section and got o the fish department...airstone and pump 15 bucks and a ph tester kit 6 bucks

As the plant(s) get larger, you'll need to change the water less often, due to the mass of the root system and the small capacity of the reservoir. They'll drink it up like you wouldn't believe.

A word of advice with the Aerogarden. If you MUST use their included nutrients, don't use the entire tab. Remember, less it always more. If you think they need more in their diet, you can always give them more later. Those plants are still a bit young anyway, so that's neither here nor there.

~Ethno

right, but the salt build ups in the res can be toxic. drinking lots of water=lots of salt residue left behind

thanks for all the help. Alright im using my old fish pump and bubble stone. im also gonna go buy the ph test. also im jw, when the time comes to flower plants in the Ag, is there a setting for 12/12 or do i have to use a timer?