newworld,...good to see you pop in. You gave me advise one time about not needing perlite in the hempy res when using mapito and you were right on...you were also one the few to comment about it here on RIU ....with not a lot of experience talking elsewhere ..could I ask about your experience with mapito and/or hempy? Got some grows or links to such? We are hungry at WOH...
Well I tend not to comment too much but I'll share what I have learnt with mapito, always let the medium dry out between waterings whether in veg or flower, this injects a lot of oxygen to the roots, when you water...do so plentifully so the entire medium is saturated and deal with the run off in whichever manner you choose. This applies to hempy or standard pots! I personally use the hempy method though. The time it takes to dry the medium out will depend on temps, lights, pot size and plant size.
In flowering the first 2 weeks feed heavy then flush well for the 3rd week and ease off the nutes a little at a steady EC 1.2 till week 7 or your last week. I grow solely under LED so my nute schedule is simple, I use only seaweed extract and nothing else, my clones get an EC of 1.05 PH 5.5, vegging plants EC 1.2 & PH 5.5. Flowering plants EC 1.4 PH 5.8 then back off to EC 1.2 PH 5.8. Flush is tap water at 0.6EC PH'ed to 5.8. When I used HID I would up the flower to 1.6-1.8EC with veg PH at 5.5 flower at 5.8. Feed one watering flush one watering. Flushing periodically is what I consider the secret. It also helps when recycling the medium for new pots which I do about 6 times or until it gets too fine and you will notice this as the medium feels compacted to the touch when in the pot.
Sorry but as always I am reluctant to put up pics but you can see pics somewhere in dawgs area 51 thread in LED lighting. I use 1 litre air pots to clone and veg to around a foot, then throw into flower in 2.5 litre pots. Between 9 and sixteen plants in SOG style in a 32" sq area but I am also doing 4x bigger longer vegged plants at the moment instead. The object as always is to produce 1g per watt under 250W LED panels. I have 4x panels so this is reproduced every 2 weeks.
Any questions please ask.