[Rondon]

Originally Posted by Absolem

Coco coir degrades at a constant rate and releases 30-50 mg/l or 30-50 ppm of K for the plants to use. I think they over estimate how much K the coco will release and add to the nutrient profile. That's why Canna doesn't want people cutting their coco coir with perlite because the more coco coir you remove and replace with perlite means you are cutting down the K levels even more.

I agree 100% with this. Coco coir does release K over the course of a grow no doubt but I too think Canna could use a bump. I have in the past added potassium sulphate in peak flower and as the crop winds down. Definite noticeable improvement. You dont need much. I also like adding about 40 to 50 ppm (x500.scale) of potassium silicate all through veg and cut it after stretch and flowers are done setting and start to plump. Thats about the time I start to add K sulphate. General Hydroponics has that Cocotek Coco A & B and they dont seem to think a high K in the base is a bad thing. There is definitely room for different potassium additives and supplements if your using Canna Coco A & B. I also like adding 30 to 40% perlite to my re wetted Canna Brick Coco Coir. I know its not needed. Grown many a crop with straight uncut coco but I like the faster dry downs with it. With a smaller pot (relative to what one would normally use in a peat based mix) I can really hit them with multiple daily feeds with my drip system.

[Absolem]

Originally Posted by Rondon

I also like adding 30 to 40% perlite to my re wetted Canna Brick Coco Coir. I know its not needed. Grown many a crop with straight uncut coco but I like the faster dry downs with it. With a smaller pot (relative to what one would normally use in a peat based mix) I can really hit them with multiple daily feeds with my drip system.

Hey Rondon,

I add perlite to my coco mix as well. For the same reason you do.

Iv'e been meaning to hit ya up on colder night time temps and it slowing down the stretch. You mentioned in a thread about it being an old greenhouse trick. Curious on what you found with cannabis. Does dropping the temp 15 degrees at night slow the stretch to 75% growth where a 20 degree difference will cut the stretch to 50%...etc?

I've always had shorter plants in the winter but never took notes how much the temp difference at night as a percentage would help with limiting the stretch in certain strains.

[repuk]

mmm... so turning the heaters off at night will prevent stretch? sounds useful!

Bit the bullet and ordered Krista SOP and Canna PK 13/14.

Wanna learn to take care of the orchard here, so this 25Kg sack will be also used to fertilize them.

Ordered Calcinit too, thinking on going full-salts, trying to locate Kristalon Brown or Hakaphos Basis 4...

@Absolem: would you use different ones?