yellowish burnt leave tips 2.5wks old HELP PLZ

[stonerbob]

My baby is 2.5wks old. Im using miricle-gro moisture control soil. im not sure if its overfertilization or Mg def or what. Any ideas what it could be and what to do about it?

[Weedhound]

looks way overferted to me.

[Mr. Clandestine]

That soil is probably too rich in nutrients, and nowhere near aerated enough for young seedlings. 'Moisture-control' almost certainly means 'shitloads of peat added', which can cause problems by dropping your pH to undesirable levels. Low pH, coupled with time-release fertilizers, is probably why your leaves are scorched. Young roots can't handle large doses of fertilizers.

Next time, steer clear of using any soils containing "time-released" or "slow-release" fertilizers. You can't control when these things will activate, and as is abundantly clear, it can do a lot of damage to the plants. You might also consider adding at least 30% perlite next time to provide better aeration, especially if your soil retains moisture well.

[gainesvillegreen]

Ditto on what has been said. The stuff you have has a lot of nutrients and is probably also not meant for potted plants. Get some 'potting soil' and mix that with 30-50% perlite.

You can transplant your plants now, and should do it before they grow too much.

[stonerbob]

ok, I've got em' in Top Notch nute free potting soil with about 40% perlite. Thanks for the info.

[gainesvillegreen]

ok, I've got em' in Top Notch nute free potting soil with about 40% perlite. Thanks for the info.

Cheers mate.

[stonerbob]

Ok, its been 7 days since the transplant. Lower leaves are way worse. They are brown and just crumble away. leaves are developing chlorosis. This is my first indoor grow and I have no idea whats wrong.

[stonerbob]

My water is showing to be realy soft and it has some chlorine. could this be causeing the tips to burn and the leaves to yellow?

[Mr. Clandestine]

Test the pH of your water AND the pH of the soil... you'll want to learn how to keep the levels in an acceptable range for soil, which is right around 6.6. There's quite a bit that can cause those symptoms, so fill out as much info in the Troubleshooting Form (http://boards.cannabis.com/plant-problems/127058-troubleshooting-form-yay-you-know-you-wanted-one.html) as you can possibly list. That ought to help get you an accurate diagnosis.