Please help Yellow scars on leaves my plants going to shit !!!! Help please

Hi my plant is starting to get yellow scars on its leaves im growing in coco under a t5 veg light i think my last feed the ph was wrong could this be the problem ?

You need to describe this more, like what soil are you using what is the room temperature, what ferts do you use and how often, etc. can't determine what's wrong with so little info.

Sorry Im useing canna coco my room temps are around 25c im useing canna A+B im feeding around once every 3 days or untill the meduim is dry

I think you have 2 problems, one is the temp at 25C, which is just over 80F, is a little too warm and is shown by the tips that are curving upward. This plant usually does this when air temp is a little too warm. You could reduce the effect by keeping an oscillating fan on the plant. Not too much wind but enough to reduce heat and knock the plant around some. The other is how often you fert. I think feeding every 3 days might be a little too much. Here's a sample of what I found on the web for a successful coco and canna grow, where the author says he give a break in fert with some watering. Right now it's hard to tell if you're feeding too often or two much, probably too much in the water mix. The author states his schedule, but keep in mind that that he's using perlite too and just water on the fourth day. It seems like a lot to me to give a fert mix every day, but that what he says. Feeding when your medium has gone dry is probably a good idea, to promote oxygen at the roots, and I can't determine how thoroughly this guy waters because he doesn't say if he waters all the way to complete saturation, or just until the coco appears wet. One thing you didn't mention is how many tsp you're using or ppm. That's really what you need to pin down. There are feeding schedules online but they tend not to say how often to feed. Maybe it's once a week, kind of hard to tell. It's pretty much trial and error. In the end, you have to gather some info from others that have been successful and make some educated guesses. It's easy to over do it. Here's the text I found from a grower that claims good success. It's a different kind of schedule, but maybe nothing ventured, nothing gained?


I've been using Canna Coco nutes for the last four years and have had great results. I grow in containers filled with a mix of 70/30 coco/perlite and water by hand using a pump sprayer. I feed with nutes for 3 days and on the 4th day I use plain water using the following schedules....

Coco A and B without the use of any additives. When I grow without additves, I use the following ratio's...

Seedlings - Mix 10ml of both A and B to 1 gallon of water. I water once a day for 2 weeks.

Veg Stage - Mix 15ml of both A and B to 1 gallon of water. I water once a day while in veg.

Flower Stage - Mix 10ml of both A and B to 1 gallon of water. I water once a day while in flower. Flush with plain water two weeks prior to harvest.

Coco A and B with the use of additives. When I grow with additives, Canna's Rhizotonic, Cannazym and PK13/14, I use this schedule...

Seedlings - Mix 10ml of both A and B and 5ml of Rhizo to 1 gallon of water. I water once a day for 2 weeks. I only use Rhizo in the first 2 weeks to boost root development.

Veg Stage - Mix 15ml of both A and B to 1 gallon of water. I water once a day while in veg.

Flower Stage - Mix 10ml of both A and B and 5ml of Cannazym to 1 gallon of water. I water once a day for the first 5 weeks in flower. At week 6, I stop adding Cannazym. I add 10ml of PK 13/14 instead for 1 week to help fatten the buds prior to harvest. I flush with plain water two weeks prior to harvest.

GS

Buds fed with Coco A + B, no additives.

25deg. Celsius is 77deg. Fahrenheit, and I believed that to a good temp...?

yes, you're right, that's a better temp but you still show a small leaf edge curling. a fan would help if you don't use one yet.

The fan will also strengthen your stems..