New grower having some problems

This is actually my second grow but it is under diffrent conditions. I am growing indoors and having the same problem I had on my first grow. The smaller leaves are turning yellow and they crumble when you squeeze them. The plants are only about three to four weeks old if that and have just gotten their first set of true leaves. I was not using any ferts. but now i am using tomato fertalizer from wal-mart after a friend told me to use it. Is this good? I am growing under a 150 watt UV reptile light. It is said this light is the closest thing to the sun you can buy. Should I switch back to my wal-mart flourecent grow lights? any help will be appreciated.

 

a reptile light should not be used for growin

 

i wouldn't use tomato fertilizer dude, switch it out for something else and see if it works.

 

Yeah you need a better light, What kind of ventilation do u have is it to hot? to dry? whats the air temp. Indoor is tricky, evryone says its so easy but u have to remeber U are trying to recreate mother nature indoors. seasons and such. It's tricky. I am still new myself but have got in uncontroll. find your local Hydro shop in your area and ask for help. Good luck!!

 

True not on its own but I recently viewed a POTTV episode where the UV Reptile light was discussed in regards to possibly increasing resin production. Theory is that that the plant produces more to protect itself. Now outdoor plants that are battered by wind rain and such are usually below potential anywho BUT indoors potency could see an increase.

 

Try
"superthrive" its a nutrient you can find at any plant supply place just dont use too much.

Good luck

 

Well superthrive is not a nutrient per se it is more of an additive to aid in root growth /development. It is good stuff nonetheless and is used at a drop per gallon.

 

The tomato fert should be ok, tomatos and marijuana grow virtually the same, but this early in the plants life they need a VERY little ammount. I wouldn't go above 1/5 strength just to be safe, it's sort of hard to judge since the stuff isn't in front of me. One thing that would be good to tell us is the ratio on the ferts (N-P-K). Look on the back of the box I'm sure itll be there. In veg you want higher levels of N (nitrogen) If the fert is 5-5-5 or 10-10-10 (there is a good chance of this) then just throw it in the trash. All in all it would be better to get some better nutes, I use pure blend pro with liquid karma, my plants like it, might wanna check that stuff out. Fox farm makes good nutes also.

Ferts are the least of your worries, though; I would feed straight water for a while. If the leaves started going south after you added the ferts this means one of 2things: you gave them too much food, or your pH is outta wack. When did the yellowing start? What kind of soil are you using? What does the soil have in it? Did you add anything?

Also, post pictures, itll make it much easier to help you. Right now its like the blind leading the blind...

 

the first four leaves are comming out the big one is yellow and dry help......please

 

Another thoght!

It's possible the light is too close to the leaves, they get crispy when light is too hot.

 

what is your growing medium? THere are good enough soils and there are really bad ones. read what the ingredients are in the soil and post what they are. sometimes there's pine bark and other hot stuff that won't let your young plants get to node 3.

what's up with this thread? nachos4connor, are you having a similar problem to what was going on early last fall with the other dude?

 

why are you saying that pine bark is hot?

 

if you're wondering what I mean by 'hot,' I just mean that it's too nutrient-rich and perhaps acidic.

if you're asking why I consider pine bark 'hot,' it's because it instantly turned my seedlings yellow and killed them and I assumed it was the pine bark being hot.

 

pine bark is acidic but it's far from nutrient rich. it needs nitrogen to decompose which is probably why your seedlings turned yellow.

 

so does 'hot' just mean nutrient-dense or acidic?

 

Normally, "hot" is referred to as having too much nutrients for seedlings (ie: overfertilization). Herb can handle a wide pH range and live (not really well at the extremes but live nonetheless).

 

nitrogen more than any other nutrient can burn your plants. it generally comes in the form of urea or ammonium nitrate and they're both salts. if you over-apply the fertilizer, as the salt diffuses in the soil, it draws water from the plant. water moves toward the salt in order to balance the plant and soil salt levels.