New Grower How much and when to use "Plant Magic Magne Cal+" on Auto's?

[420ing]

Hello people hope you are all having a great day! I got something on my mind. I have been wondering when im suposed to start using a calcium/magnesium supplement when growing Auto's under LED's?

I currently beleive im seeing the start of a cal/mag deficiency at just over 2 weeks into veging. The plant was started in Root Riot cubes and moved into a 20 litre airpot that has a 60/40 mix of biobizz allmix and plant magic soil supreme.

The reson for mixing the 2 soils together was so that i could get the use of the biobizz allmix wich is too hot for auto's by diluting it with the lighter plant magic soil and maybe not have to worry about feeding her as much.

Should i give it 1/4 strength dose since it's an auto or give it full strength? Also im wondering is it too early to start seeing a cal/mag problem at 2 weeks? Seen some people saying they start feeding theirs from the start and others waiting between 2-4 weeks.

Cheers!

 

[F.N.]

At day 20 I started with a cal mag supplement full strength. I use pro-cal made by green planet. I have not had any problems with cal mag. If you are noticing it get it going asap

 

[420ing]

Thanks man im gonna give it a full strength dose. I have a pic of what i noticed when i got back from work.



This was not there when i left at 9:30am but was present at 5:30pm when i got back. Its like a brown/orange rust spot. There are a couple of other tiny ones but i know how rapidly this can progress as it happened to me before on the last grow i did. Just thought id post it here incase it's something else causing it. Just noticed aswell the very edge of the leafs seems to be curled slightly upwards. Could it be too dry? I got a humidity sensor and its around 45%-55% (+/- 5%) Temps between 24c-29c so far.