Can't fix this leaf deficiency plz help

[Ronin_420]

I need some help plz. I have a cpl of plants
3 weeks old. In bio bizz soil in 3.5lt pots
They are under 400watt of metal halide
Temps are 25c tops 60%humidty I have only
Gave one feed of biosys and 1 x feed of calmag
At Ec0. 4 yesterday. Does anyone recognise this deficiency.

 

[f-e]

Over feed most likely
In composts, I feed nothing until they ask. At which time, I pot up. There is no way that little plant has exhausted the compost. Don't push so hard.

 

[Ronin_420]

Think you maybe right some of the leaf tips
Are yellow.
Do I flush them when there nearly dry as I watered them yesterday with calmag

 

[TanzanianMagic]

I need some help plz. I have a cpl of plants
3 weeks old. In bio bizz soil in 3.5lt pots
They are under 400watt of metal halide
Temps are 25c tops 60%humidty I have only
Gave one feed of biosys and 1 x feed of calmag
At Ec0. 4 yesterday. Does anyone recognise this deficiency.

I looks like either magnesium/calcium def/lockout in the early stages.

The solution is to:

1. Repot into a larger pot.
2. Feed 0.1 EC of epsom salt (MgSO4) and 0.4 EC of high P/K late flowering nutrients (Plagron's Green Sensation, Canna P/K 13-14, Atami B'Cuzz Bloombastic, etc.)

Because of the low concentration and one time application (at transplanting), you can use mineral nutrients in an otherwise organic grow. I've done that in many plants, without detriment to the organic life.

Also, you might want to add a tablespoon of magnesium lime to the All-Mix - it couldn't hurt, and it will reduce magnesium deficiencies, while also providing calcium and keeping the pH a little higher/more stable.