old soil

gethigh

gethigh

Active Member
I did an experiment using some soil from my previous plant that I harvested. The plants grew to be about 1 inch tall and stopped growing. It just started turning yellow and died. lol. So just wondering if it was the cause of my plant's death or if there was something else.

It was under 3 65k cfls. Had one fan in for ventilation. Temp was always at 78-80 degrees. Water every 3-4 days or when soil is dry. Lights are on 18/6. :eyesmoke:
 
Brick Top

Brick Top

New Member
I have known people to reuse soil but you have to be sure to totally flush it and check the pH level. If you have a buildup of nutes in the soil from a previous grow and then toss in seedlings they will get to much nutes and burn. If the pH is off you can have nute lockout. If the soil was used fairly recently and has a lot of old roots in it they can be decaying so it is like trying to grow in a compost pile and that means heat, more heat than roots like since decaying plant matter creates heat.

There can be any number of reasons why your plants are turning yellow. If you can give some detail about the soil when it was last used, as in how long ago, if it was well flushed or not, if there was much of the old root-ball left in the soil, if the pH level was checked and anything else you can think of to toss in then someone might be able to tell you just what happened and if there is anything you can do other than just replacing the soil with new fresh soil.
 
TeaTreeOil

TeaTreeOil

Well-Known Member
Old soil is full of roots and not good to use. A rule of thumb is to toss the old soil and get fresh soil. The old soil can be added to a compost pile or used on flower beds or around trees(trees will eventually displace themselves, they can rise out of the ground, from all the nutrients they absorb). Covering those exposing roots can't hurt.

Try to remove the roots if you're not going to compost it.
 
gethigh

gethigh

Active Member
Thx guys. Didn't flush the soil, so thats probably why. Ph is around 6.5. I think I'll just get new soil instead reusing them, save me more time and more reliable. Thxs again
 
panhead

panhead

Well-Known Member
Get new soil,its too cheap a product to chance the drastic effects old soil can have.

I flush the hell out of my soil right after i chop then dump into a pile in the corner of the yard near the garden where its composted until the next season,on the next season i use about 25% of the old composted/flushed soil in my new soil but never straight old non flushed soil.
 
TeaTreeOil

TeaTreeOil

Well-Known Member
Why flush the soil if you're going to compost? Compost would love those nutrients. Other than pre-harvest 'flush'..(ending nutes) but post harvest flush? That's new to me.
 
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