Some leaves have some rust on it

Troubleshooting Diseases
1

A question of a fellow grower:
this is only my 2nd grow session,
I have some problem problem with my plant, as you can see in attachment, some leaves (it is rather local than global) have some rust on it.

My setup is:
box 0.8x0.8
250W HPS for light
sees: auto critical Jack
Watering every 4-5 days (I do with the weight) with a pH around 5.5-6.5
fertilizer: root stimulator rhizoponics
biobizz fish grow
biobizz biobloom
biobizz topmax

I followed The biobizz calendar (except for the root stimulator where I used it until the end of week 3)

they’re growing for 37 days now, and they began flowering phase about 2 weeks ago

sorry for bad english
I hope That I won’t take too much of your time,
thanks in advance for the return.!

image
image866×1154 389 KB

2

What are you growingin? Hydro, coco, or soil

3

Hi,
I’m growing with allé mix soil mixed with 20% of coco

4

Looks like a calcium issue to me.

5

Also, dial in your pH. 5.5 is too low and 6.5 is the sweet spot. Try to stay between 6.3 and 6.8 consistently to prevent lockout

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