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Forum: Hydroponic Grow Lights 11-16-2010, 06:41 PM
Replies: 1
Views: 7,378
Posted By EarlyPan
Cool Light Wavelength

Hi,
Has anyone ever attempted to measure the LUX at a specific wavelength, for example 630 nm? I,m thinking that if I could use a filter to pass only the light around that wavelength, which seems...
Forum: Hydroponic Grow Lights 10-22-2010, 07:38 PM
Replies: 16
Views: 15,318
Posted By EarlyPan
LED lighting

Regarding growing under LED's it's important to remember that with light, light of any type, the intensity on a surface varies inversely with the square of the distance. That means that if a lamp...
Forum: Hydroponic Nutrients and Mediums 10-21-2010, 07:50 PM
Replies: 3
Views: 6,310
Posted By EarlyPan
pH adjustment

As a retired chemist let me caution you about adding too much of either up or down when the pH is near neutral or 7. I use 15 cc's of grow nutrients and 15 cc's of either grow or bloom per gallon. ...
Forum: Your Hydroponics Setup 12-10-2009, 08:15 PM
Replies: 8
Views: 5,304
Posted By EarlyPan
No Blossoms Yet

Sorry, I made a mistake. I used half zeolite and half pearlite, not zeolite. Also I don't know whether any of the three tomatos are determinite or not.
Forum: Your Hydroponics Setup 12-10-2009, 06:42 PM
Replies: 8
Views: 5,304
Posted By EarlyPan
No Tomato Blossoms yet

The tomatoes with no blossoms are 42 days from first sprouting. They are Celebrity, Short stem, and Purple Ball variety, all of which I have grown successfully in my greenhouse. The support mixture...
Forum: Your Hydroponics Setup 12-10-2009, 12:03 PM
Replies: 8
Views: 5,304
Posted By EarlyPan
No Tomato blossoms yet

Hi,
I'm new to indoor gardening. I've got three different types of tomato plants growing in an ebb-and-flow and they're doing very well but no blossoms. What would be an expected seed to blossom...
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