Burning that begins at the tips is often caused by salt burn... if you are in the southwest and get your water supply from the salt river like we in az do then u know all about it.

Try flushing out your soil very well for like an hour. Just leave the hose there on a slow drip, make sure the water isnt puddling but being absorbed into the soil.

If you are watering the same amount every time and it isnt running well out of the bottom then the water is reaching the same poing in the pot every time accumulating a salt layer.

Just a theory :O might be somethin else.
essnine Reviewed by essnine on . outdoor clones 4 of these were vegged indoor under 400watt mh light for more than a month now. I placed 2 plants outside on the 1st of July and I forced flower them on the 14th of July by placing them indoor at night for 12 hours. I'm not too eager to do this everyday but hopefully it will be worth it comes harvest time. Picture 3 is maui wowie. Nearly one month into flowering. Picture 4 is hindu kush skunk also nearly one month into flowering. The other two that are also maui wowie and hindu kush Rating: 5