Multiple plant problems

[recky]

Hi guys!

Growing 3 autoflower plants in 70/30 coco>perlite medium, 15 liter pots a 120x 120 x200 cm grow tent. I have a 600w watt led light. Current humidity is 48% and ph reading for the water im giving them is 5.8. Feeding with growzilla 2 part nutrient with an npk ratio of 28.5.30.

Having a few problems with my plants and I was wondering if someone could help me out with identifying some of them. I have a darkening colour and roughness to the touch on the fan leaves, also the tips of the leaves are really bright yellow, there seems to be a few bite marks on some of the leaves and lastly I have noticed some brown blotches. Will upload photos of then as well. Thanks a lot for your time guys!!!. Btw this is the start of week 4.
​

Attached Files:

 

[HonestGR]

My guess from looking at the pictures is you have been watering on top of the leaves. A foiler spray should be put on after the lights are off (If I am not mistaken). Letting water dry off on leaves will allow light to refract in the droplets causing some burning of leaves, not to mention what the nutrients (I assume your using) leave behind.

Water under the leaves and that "should" clear up the issue. You should notice on new leaves, old leaves tend not to recover. If anyone else has ideas what it could be, chime in!

 

[recky]

oh Wow I didn't even think of that!!. Cause that's exactly what I have been doing like I even feed them on the leaves as well as the coco just because I didn't know before . Thank's for you're advice man!! i'll update and see how they go

 

[MrSauga]

HonestGR is correct. The spotting is from the light burning through the droplets. It acts as a magnifying glass. The yellowing tips is nute burn. Overfeeding. most growers tend to go half strength max with their nutes until they have an understanding on when to boost it up with a particular product line. Try going to 1/4 strength and keep an eye on the new growth.

If you have a PPM meter (pen) then you can use the following as a guideline to your final mixes.

ppmValues.JPG

• MrSauga
• Nov 2, 2018

 

[HonestGR]

@recky , Not a problem. There is always a learning curve. Now you know and you can deal with other issues as they arise