Heat stress or nutrient deficiency?

spek9 said:

You do not need nutrients made specific for coco. Or any medium.

You adjust the nutrient solution for the medium by adjusting the level of pH of the mixture before giving it to the plants.

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soil already contains nutrients which a soil grower would just be topping up
a coco grower would be proving all of the nutrient through feed as there is none in the coco

how would you accurately measure how much you're giving the plants? there isn't two different charts

it will say add 2ml but my coco lacks the 0.5ml for example of nutrient in the soil i get deficiencies or you get nute burn

no doubt it works just it's not for me i don't ever touch acid or alkaline its bril reaching 6 weeks into veg with monster plants even the bottom baby leaves still green alive and attached

NeighboursFenceShifter said:

soil already contains nutrients which a soil grower would just be topping up
a coco grower would be proving all of the nutrient through feed as there is none in the coco

how would you accurately measure how much you're giving the plants? there isn't two different charts

Click to expand...

Soil typically contains enough nutrients to get through about four weeks. After that, nutrients must be added. In coco, peat or other inert growing medium, it's much more like hydro, and nutrients must be added from the beginning.

You measure your nutrients by using an Electrical Conductivity (EC) or Total Dissolved Solids (TDS) meter. EC tells you, well, the electrical conductivity of the water (which you can decipher the strength of the solution). A TDS meter measures PPM (Parts Per Million) of the dissolved solids in the solution. A TDS/PPM meter is a EC meter, but it displays the result in PPM instead of EC.

For example, in veg, all of my plants except for brand new seedlings get 750-850 PPM (1.5-1.7 EC), and in flower, a bit higher at 900 PPM (1.8 EC). The baby seedlings have the same veg nutrients, but diluted to half strength (~400 PPM).

Those measurements don't work for everybody, nor do they always work for all of the plants in the same tent. Some adjustment may be necessary here or there.

Both plants exhibit contorted leaves / variegation....both of which point to a pH issue. I wouldn't do anything but double and triple check you're where you're supposed to be pH wise based on your style of grow. Good luck.

Hi,

Because this was my first thread and you help me to understand many things that I didn't know, here there is an update on this 3 plants.

Thanks to everyone and happy growing.