Hey penny wise can I ask you some questions about Coco coir and lighting?
I want to know how far to keep a 400 watt mh lamp away from seedling/small plants?
My plants are 19 days old but growing still very slowly in Coco they are in 2l pots and most plants have roots popping out of the drainage holes.
I noticed that some plants start to curl up their edges, they don't have taco leaves and only the edges turned up a little bit
So I hung the light further away from around 35cm to 45cm from the tops of the plants. Maybe they are light/heat stressed and that's causing the slow growth. They have 3 to 4 sets of true leaves.
I saw you helped a lot people on cultivators Coco grow guide so I think I'm right asking you questions about Coco
I'm feeding my plants 0.3ec calmag and 0.9-1.0ec sensi Coco grow, total ec is 1.2-1.3
I did feed them around 200ml a day and last watering I gave them more to get some runoff to test the ec/ph.
That is three days ago and the pots still feel heavy and I didn't watered them since.
I saw you and cultivator said to water daily even if the coco is wet.
I'm not sure if I should water because the last time I watered to runoff the pots were soon soaking wet and the coco also drains really poorly but my pots have more than enough drainage holes.. I think the coco has a lot of Coco dust, I did test a 0.25l pot and drained a liter of water through it and the runoff water had a lot of muddy Coco dust in it.. I think that is why they are having problems atm. I weighted the 2l pots after I drained them and the pots weighted 1.1kg and that's really heavy for a 2l pot.. I'm not sure if I should water still daily now or let them dry down to 50-70% of its saturated weight.. I hope you can give me some help
Peace