Transitioning From Dtw Coco Coir To Rockwool

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That looks like my smartbee graph.
I water every 24 hours in veg. In a 50/25/25 Coco croutons/ricehulls/coco pith mix. And 3-4 watering in flower in 7 gallon pots.
I set the Threshold at 40% water content if it drops below 40% the pump will kick on for 20 seconds. Until the regular irrigation Cycles.
This normally is only a problem about an hour before the lights come on.

 

[nicolajanjak]

with big plants in relatively small containers, i find coco really similar to mineral wool

the thing with rw is that it allow smaller dryback for optimal growth ... (so faster growth)

if you use a moisture sensor and take measurement at the middle of a hugo cube (horizontally) you will find around 80% WC at first soaking. but as the plant will establish, the medium must hold less moisture..

tats why grodan advise 75% moisture content for veg, with 20 % dryback during night.. and 60% water content for bloom, with 20-25% dryback)but imo this will only works if the grower do some wet/dry cycles after transplant to build a solid root mass ... around 30 % dryback maybe even 40 not sure

i noticed plants must be treated generative to produce roots

the coco i used was giving pretty much the same values .. (in smartpots 1 gal ). this coco didnt have chips or big chunks, it was water retensive coco, but still great

i would just use slightly bigger dryback than rw cubes, and also because coco dont seem to really have moisture gradiant like rockwool cubes ..

 

[cemchris]

with big plants in relatively small containers, i find coco really similar to mineral wool

the thing with rw is that it allow smaller dryback for optimal growth ... (so faster growth)

if you use a moisture sensor and take measurement at the middle of a hugo cube (horizontally) you will find around 80% WC at first soaking. but as the plant will establish, the medium must hold less moisture..

tats why grodan advise 75% moisture content for veg, with 20 % dryback during night.. and 60% water content for bloom, with 20-25% dryback)but imo this will only works if the grower do some wet/dry cycles after transplant to build a solid root mass ... around 30 % dryback maybe even 40 not sure

i noticed plants must be treated generative to produce roots

the coco i used was giving pretty much the same values .. (in smartpots 1 gal ). this coco didnt have chips or big chunks, it was water retensive coco, but still great

i would just use slightly bigger dryback than rw cubes, and also because coco dont seem to really have moisture gradiant like rockwool cubes ..

+1 solid advice