InuYasha
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- Joined
- Jun 9, 2008
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I started 9 CH-9 Jack Fems from seeds in rockwool about 2 weeks ago. 2 days ago I noticed some yellowing on the tips of one of my seedlings. Another one is now showing some faded spots and now its tips are yellowing too. I'm concerned b/c I don't want to lose my first hydro-crop before it even enters veg.
I feel that I've been conservative on the nutes, as I heard burning is a common newbie problem. Heat is also an issue, so I figured lower on the nutes would be better. I was using 1/2 the recommended strength 3-part GH Flora Series for seedlings until today (Micro:Bloom:Flora 1/8th tsp / gal distilled h20), then fearing I had N deficency I upped the strenght to just under the GH recomendations (1/4 tsp / gal distilled h20) when I transplanted them (in the rockwool cubes) from the garden flats to the GH Rainforest today.
Here are my notes and some pics:
Space: 2x4x7 tent
Vent: air exchange via 2 160cfm inline fans run 15m/hour. Internal circ 24/7 from ossc. clip on fan.
Light: 600W MH Conversion Growbright lamp (claims 72,000 lumes), 20x24" Aeroflow Reflector (inline fan cooled). 26" above plants.
Planters: GH Rainforest 66 Aeroponics run 1hr on 1hr off 24/7
Air Temp: 80-93F (26.7-33.8C) (I'm working on cooling it down)
Ph: 6.0
Nutrients:GH Flora, 1/4tsp / gal. TDS=approx 150ppm, but "dirty" hydroton and Hydroguard I beleive accounting for much of that. GH calculator puts nutrients at 75ppm.
I'm thinking N deficency is the problem, but other suspects include: high temp, overwatering (before transplant, while in the flats), too much light, too little light, global warming, and Joe the Plumber.
Any ideas?
I feel that I've been conservative on the nutes, as I heard burning is a common newbie problem. Heat is also an issue, so I figured lower on the nutes would be better. I was using 1/2 the recommended strength 3-part GH Flora Series for seedlings until today (Micro:Bloom:Flora 1/8th tsp / gal distilled h20), then fearing I had N deficency I upped the strenght to just under the GH recomendations (1/4 tsp / gal distilled h20) when I transplanted them (in the rockwool cubes) from the garden flats to the GH Rainforest today.
Here are my notes and some pics:
Space: 2x4x7 tent
Vent: air exchange via 2 160cfm inline fans run 15m/hour. Internal circ 24/7 from ossc. clip on fan.
Light: 600W MH Conversion Growbright lamp (claims 72,000 lumes), 20x24" Aeroflow Reflector (inline fan cooled). 26" above plants.
Planters: GH Rainforest 66 Aeroponics run 1hr on 1hr off 24/7
Air Temp: 80-93F (26.7-33.8C) (I'm working on cooling it down)
Ph: 6.0
Nutrients:GH Flora, 1/4tsp / gal. TDS=approx 150ppm, but "dirty" hydroton and Hydroguard I beleive accounting for much of that. GH calculator puts nutrients at 75ppm.
I'm thinking N deficency is the problem, but other suspects include: high temp, overwatering (before transplant, while in the flats), too much light, too little light, global warming, and Joe the Plumber.
Any ideas?