Rust spots on leafs due to LED board?

[Benjic93]

With my 4 different strains, every on of them has atleast one spot of rust looking on a leaf. I didn't have this on my last grow with HPS.

Would this be down to @Invisible Sun boards? Is there a supplement I should be giving them?

Reading up, possibility of calcium or magnesium def. I have plant magic magncal although there schedule recommends to use in bloom.

[Benjic93]

Unpopular opinion here but you need calmag mate. I always have to run a smidge when growing under LED.

[Benjic93]

Unpopular opinion here but you need calmag mate. I always have to run a smidge when growing under LED.

Thankyou mate, shame I fed them before the picture but I'll add it too the next feed. Cheers

[Benjic93]

You can foliar feed them a little now to get some into the plants. They will actually respond quicker to being foliar fed.

[Benjic93]

You can foliar feed them a little now to get some into the plants. They will actually respond quicker to being foliar fed.

Appreciate that mate, just looked up to make sure I can foliar feed the PM stuff. Will get it done ASAP.

[Benjic93]

hi as said a foliar of epsom salts or cal/mag will stop it getting worse but the marks will remain,foliar is taken in quickly and best applied in as fine a mist spray as you can both on and under the leaves soon picks them up,good luck

[MrNice]

Got same problem Benjic93 calcium def

[Benjic93]

hi as said a foliar of epsom salts or cal/mag will stop it getting worse but the marks will remain,foliar is taken in quickly and best applied in as fine a mist spray as you can both on and under the leaves soon picks them up,good luck

Mr duke folier feed once a week cal/mag only through veg stage ?

[Benjic93]

hi as said a foliar of epsom salts or cal/mag will stop it getting worse but the marks will remain,foliar is taken in quickly and best applied in as fine a mist spray as you can both on and under the leaves soon picks them up,good luck

Mr duke folier feed once a week cal/mag only through veg stage ?

hi if i use foliar i go high ec sometimes up to 3ec but safer is around your normal feed dose and i use a fine mist and if needed 2 days later do it again,in veg or very early flower is best,i use to revive my starved and neglected clones at the high ec,only killed a couple like that! epsoms dissolved in warm water 1tsp per 5 ltrs works good,peace

[Benjic93]

hi as said a foliar of epsom salts or cal/mag will stop it getting worse but the marks will remain,foliar is taken in quickly and best applied in as fine a mist spray as you can both on and under the leaves soon picks them up,good luck

Cheers @duke will give them a good foliar feed with the magnecal once lights are off then start introducing it to the water feed.