Deficiency Help

[CannaELL]

Hi guys, I’m fairly new to growing to bare with me here, I’m growing autoflowers and they are around week 5 ish now, I’ve been giving Canna A+B and CalMag every other feed for the past two weeks, however recently I’ve been having some issues, I’m phing my water after using nutes to 6.5 everytime, I’m growing in regular soil not coco and I’m using a COB light 300W, I’m sure it’s not any pets/mites etc as I’ve checked under the leaves, any help
Would be appreciated! Thanks.

 

[Blew Hiller]

Not sure what type of soil you are using but they look like they are get overfed....

More details please

 

[CannaELL]

Not sure what type of soil you are using but they look like they are get overfed....

More details please

thanks for the reply! I am using Multi purpose compost with added John Innes, here is the link , Multi Purpose Compost w/John Innes - 50L NF | Wickes.co.uk

I have also added around 20% perlite to each 10 litre bucket! Cheers

 

[Emilya Green]

The soil sounds nice and rich and probably isnt the problem. As Blew said, the dark green and the clawing are indicative of over feeding... back off on the nutes a bit. If you are feeding every time, feed every other time and see how that works. The little spots are the start of something, and being on the lower leaves and sort of spotted all over the place, this is most likely a magnesium deficiency. This is very common under LED light, and again more so likely if you use filtered water. Calmag+ is your fix... the spots will never go away, but you can stop its progression by starting to add this supplement.

 

[CannaELL]

The soil sounds nice and rich and probably isnt the problem. As Blew said, the dark green and the clawing are indicative of over feeding... back off on the nutes a bit. If you are feeding every time, feed every other time and see how that works. The little spots are the start of something, and being on the lower leaves and sort of spotted all over the place, this is most likely a magnesium deficiency. This is very common under LED light, and again more so likely if you use filtered water. Calmag+ is your fix... the spots will never go away, but you can stop its progression by starting to add this supplement.

Thank you! , I was feeding every other feed with the nutes, So I should feed with calmag every feed now to combat this? Cheers thank you!

 

[Emilya Green]

Thank you! , I was feeding every other feed with the nutes, So I should feed with calmag every feed now to combat this? Cheers thank you!

yep, thats what I am thinking

 

[SmokingWings]

.........This is very common under LED light, and again more so likely if you use filtered water. Calmag+ is your fix... the spots will never go away, but you can stop its progression by starting to add this supplement.

Got curious on the product as I watch a similar leaf issue on some, but not all, of the plants I have had growing the past couple months.

I have found two possibilities for a product with that name. Are you talking about the "Botanicare Cal-Mag Plus"? The other one I found was "General Hydroponics CaMg+". I did not look into the details to see what, if any, differences there was between that product and the same companies "CALiMAGic".