Help!!!

Hi

I put my seedlings under light about two days ago and i think they are already dying. The little green stem has got much thinner and doesn't look healthy. I have put a see through plastic lid over them incase the temps were too high and also to increase humidity. Can anyone give me tips on what to do?

Brick Top said:

Have you been watering your seedlings and if so how much and how often? You may have over watered and have a damping off problem. The stem gets thin and it folds and the seedlings topple over. It is actually a fungus problem though some people do not realize that is actually what it is.

Here is a little info on it and see if it sounds like what your plants are suffering from:

Damping off fungi kill seeds in soil or seedlings shortly after they emerge from the soil. Fungi invade stems of seedlings at the soil line, causing a brown watery soft rot, then the plants topple over. Most damping off is caused by two Protoctistan Pythium species (technically they are o–mycetes, not fungi), P. aphanidermatum and P. ultimum. Several fungi also cause damping off—Rhizoctonia solani, Botrytis cinerea, Macrophomina phaseolina, and several Fusarium species, F. solani, F. oxysporum, F. sulphurem, F. avenaceum, F. graminearum. Together they make damping off a ubiquitous problem, attacking all cultivars of Cannabis
http://www.hempfood.com/Iha/iha03111.html

Did the stems change color, or are they changing color where they are thinning?

Another problem could be simple stretch where your lights are to far away from your plants or just inadequate in providing enough of the needed light spectrum and your seedlings are trying to grow to more light and you end up with tall skinny thin stems that bend and fold.

The answer may be to replant the seedlings deep, lust leave the lower leaves above ground and plant the entire stem in the ground. If the seedlings are healthy enough to survive they will send off new roots from the buried stems so it will increase your root mass quickly.

Still you have to determine what caused the problem in the first place and what the problem is. If it is damping off you have over watered them and if so you need to do what I said about replanting and then not water as much so adding a humidity dome would be the last thing you would want to do if it is damping off. If it is stretch you will need to get your light as close to your plants as you can after you replant them deeper but not close enough to cause a heat problem.

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Thanks for the reply.
The stem has gone green and they look a little dry and weak. They havent developed any leaves yet. I dont think its a fungus problem as I have kept them only moist. am watering twice a day but only with a sprayer and in small quanitites (as light dries them out during day). They have fallen over. The light is 2" above them as otherwise they dry out too quick. I just place more peat around the stems from another jiffy to stabilize them and have removed the dome. However I'm not sure they are going to live! Damn

I think it might of got too hot.

You should be using no more than 2 Tablespoons of water (correct pH) on a seedling in a 24 hour period for the first 5-7 days. The water needs to be poured around the stem and not on the delicate seedling. The light needs to be in the 6500K CFL range (2 23w CFLS will work well for the seedling stage).

malbulja said:

You should be using no more than 2 Tablespoons of water (correct pH) on a seedling in a 24 hour period for the first 5-7 days. The water needs to be poured around the stem and not on the delicate seedling. The light needs to be in the 6500K CFL range (2 23w CFLS will work well for the seedling stage).

Click to expand...

Thanks for the advice guys, i think it was the heat. I have a 200W envirolite and although says it has a low working temp, it definitely feels too warm. Am now blowing a fan directly on the light to cool the air. Its in the 6500K range and im spraying no more than 2 tablesppons a day in spray form (around 8-9 squirts per seeling a dat. However I'm moistening the perlite which the jiffys are sitting on as soon as they dry.

Am just preying they are ok.

I'm growing in an oxy pot system. The seeds have been under light for 36 hours in jiffy pellets. Just wondering when to transplant to the oxy pot?