Loss of colour on some leaves

[Crescendo]

Hello! I was wondering why some leaves of my lime daiquiri are having spots of a different shade and why are they curling upward a bit. Growbox condition is 80-85 degrees and humidity around 50-60%...
I started giving nutes (canna vega) since this week and going slow with that... once every 2 days. Any suggestion on what the spots could refer to?

 

[CannaCountry]

What medium are you using?

 

[Merkn4aSquirtn]

Looks like coco with a mix of something in there. If it is coco.. did you buff it?

 

[Crescendo]

What medium are you using?

Using soil

 

[TreeFarmerCharlie]

Using soil

If you are in soil then stop feeding it every two days. Water until you get run-off, then wait for the soil to dry out (2-3 days), water until runoff, and wait for it to dry out again. Then, instead of watering the next time, feed the plants, and then repeat that process.

 

[Crescendo]

If you are in soil then stop feeding it every two days. Water until you get run-off, then wait for the soil to dry out (2-3 days), water until runoff, and wait for it to dry out again. Then, instead of watering the next time, feed the plants, and then repeat that process.

Do you mean simply ph'ed water twice and then the third time water with nutes and repeating the same sequence twice? So do you think is overfeeding though I gave the canna vega nutes just once so far?

 

[TreeFarmerCharlie]

Do you mean simply ph'ed water twice and then the third time water with nutes and repeating the same sequence twice? So do you think is overfeeding though I gave the canna vega nutes just once so far?

I don't think the issue is over feeding, I'm just trying to prevent you from having to come back here asking for help with a plant that is suffering from nutrient lockout. The light spots on the lower leaves could just be damage from over watering or pH issues early on and the lighter color on the new growth looks pretty normal to me. The leaves don't look perfect, but they don't look horrible, either. I would just make sure you don't over water, or feed too much, and keep an eye on them.

 

[Crescendo]

I don't think the issue is over feeding, I'm just trying to prevent you from having to come back here asking for help with a plant that is suffering from nutrient lockout. The light spots on the lower leaves could just be damage from over watering or pH issues early on and the lighter color on the new growth looks pretty normal to me. The leaves don't look perfect, but they don't look horrible, either. I would just make sure you don't over water, or feed too much, and keep an eye on them.

I wonder if when leaves are tacoing could also be because of heat stress? My light is 20 inches away so raised it by a few more and go gentle on feeding.

 

[Crescendo]

I also noticed that my leaves are curling also if without spots so I was wondering if it could be a heat stress issue, I brought the light closer a few days ago and temperature went to around 30 degrees Celsius for a few hours yesterday...

 

[TreeFarmerCharlie]

Tacoing leaves are usually a sign of heat and/or light stress.

 

[Crescendo]

Tacoing leaves are usually a sign of heat and/or light stress.

It makes me perplexed because the light is rather far...around 60 cm away from the plants in 1 meter squared grow-room. Yet, the light intensity is 2000 μmol/m²/s at 30 cm if all 4 modules are active so might be light stress. So I wonder if I need to increase distance or reduce μmol/m²/s to 1000 (half of the modules) to prevent this from happening. Temperatures are still within boundaries generally.