Nutrient deficiency or burn ? Help!

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Jumpingspider

Jumpingspider

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Can anyone identify the problem?

Lower leaf curling and getting brown edges.

I'm pretty sure it's not burn because I'm only feeding 700ppm.

I'm thinking it could need more Epsom and maybe cal mag.

Coco coir in 5 gallon air pots week 8 of veg.
 
Nutrient deficiency or burn  help
Jumpingspider

Jumpingspider

541
143
Hydro Growers:
1. Are you growing from seed or clones?
Seed
2. How old are your plants?
8 weeks
3. How tall are your plants?
3ft
4. What type of hydro system are you using?
Coco
5. What brand/type of nutrients are you using?
Canna
6. What is the Ph of your nutrient solution?
5.9
7. What is the PPM/EC of your tap water?
7 RO
8. What is the PPM/EC of your nutrient solution?
600
9. What is the temperature of your nutrient solution?
65 f

10. Does your PPM/EC show a rise or fall when you do your daily PPM check?
Not sure
11. Does your pH show a rise or fall when you do your daily check?
Small drift +/- .1
12. Do you foliar feed or spray your plants with anything?
Foliar compost tea
13. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights")
315w CMH
14. How close are your lights to the plants?
24"
15. What size is your grow space in square feet?
4X4
16. What is the temperature and humidity in your grow space?
60-70% RH 75 f
17. Have you noticed any insect activity in your grow space?
No
18. How much experience do you have growing?
2-3 years
 
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