Pretty sure it's k I'm short on

I'm pretty sure this is lack of potassium White tips and in between veins, then turning to dry crisp brown?
I have 8 plants some really badly effected but it's my well flowered ones that are starting to get effects and I want to catch this please. Cheers

Lack of potassium yes, and possibly magnesium as well, hard to tell from just the 1 leaf.

Thanks for confirming it for me. What ways would you use to quickly add more potassium? I'm currently feeding on pk boost and bloom feed? Thanks again

Potassium Sulfate is a good way to raise K without adding more fucking P which is usually way too high in cannabis products, because of marketing bullshit and old superstitious growing habits.

Some die off is normal in plants late in flower. A whole plant pic would give us a lot more information with which to help you.

Plant pic. Fairly confident the pk has worked because one of the worse off ones is looking much much better

Scorpain said:

Thanks for confirming it for me. What ways would you use to quickly add more potassium? I'm currently feeding on pk boost and bloom feed? Thanks again

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Agreed with the above post about phosphorus, and more pics lol. Potassium is the element that is used the most by cannabis, her favourite food I have run into it on one grow with 1 plant and i upped my koolbloom a bit (0-10-10). However all that phosphorus is generally not needed as much and throughout like potassium is. Coconut water, (from raw coconuts), is a great way as well as it's really high in potassium and packed with cytokinins, that are steroids for the plant! I also use potassium silicate throughout veg and until the end of stretch (0-0-4). I add some organic molasses once or twice at mid flower, that is also high in potassium.