I also mentioned Blues as I gave him some cuttings
COCO COIR -
Don't allow coco to dry, keep moist - feed every watering, every 2 - 3 days at first. Big plants in peak flower will probably need feeding every day.
PH 5.8 - 6.2 - 6.0 is perfect, don't sweat over a point here or there. PH after adding nutrients.
No need for EC meter.
HESI COCO single bottle - Start at 3ml - 3.5ml per litre gradually up the feed 0.5 per litre to around 5ml per litre max for mature plant in flower - do not overfeed, watch the plants they will tell you if they need more. Blues will max out at about 5ml per litre depending on light intensity and rate of growth.
If you suspect overfeeding (burnt tips / claw shaped dark green leaves) flush with a weak PH'd nutrient solution at 1 - 2ml/ltr then let them recover, gently raise the feed again
When top feeding allow some run off from the pots. Discard run off - 1 litre of coco medium will hold around 250ml of liquid.
Use water at room temperature if possible (20 - 22 degrees C) to avoid nutrient lock out and shocking roots.
Keep roots at 20 - 22 degrees C - Buy digi thermometer with probe and heater for tent / grow room. Do not allow root zone to fall below 18 C if possible during lights out.
Flush with plain tap water final week of flower - do not ph the flush water. If you haven't overfed them then 1 week is enough. Longer needed if overfed
If planting cuttings in large pots there is no need to saturate the whole pot, top feed every day around 500ml - 1ltr until roots hit the bottom of pot (around 7 - 10 days hopefully) Then feed full amount of liquid as normal every other or third day.
Flip to 12/12 about 7 - 10 days after seeing roots at bottom of pot to ensure good root ball - the bigger and healthier the root ball the more bud you will have. It's all about the roots, look after them.
A good / lazy method is to bottom feed - have pots in individual saucers and pour feed into saucer until they stop taking liquid. Only do this when roots have hit bottom of pots. Calculate how much liquid the pot will hold. Try alternating between top and bottom feeding to see which you prefer.
Other additives like PK 13/14, root stimulant and silicon are all good but not strictly necessary - keep it simple at first, try one new thing each grow.
Edited by Lobo, 13 February 2012 - 03:19 PM.