Forum: Hydroponic Grow Lights
11-16-2010, 06:41 PM
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Replies: 1
Views: 16,407
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...
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Forum: Hydroponic Grow Lights
10-22-2010, 07:38 PM
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Replies: 16
Views: 36,215
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...
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Forum: Hydroponic Nutrients and Mediums
10-21-2010, 07:50 PM
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Replies: 3
Views: 9,471
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. ...
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Forum: Your Hydroponics Setup
12-10-2009, 08:15 PM
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Replies: 8
Views: 10,583
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.
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Forum: Your Hydroponics Setup
12-10-2009, 06:42 PM
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Replies: 8
Views: 10,583
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...
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Forum: Your Hydroponics Setup
12-10-2009, 12:03 PM
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Replies: 8
Views: 10,583
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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