Joined: Sun Oct 17, 2010 4:48 am
jamez wrote:You're growing in the Greenhouse right?Yes, both sets of plants in the experiment are growing side by side in one of my greenhouses.
jamez wrote:What size/type pots are you using for them?I'm using tall thermoform pots that are 5 inches deep and 2.5 inches across (I think?).
Matt wrote:Blake, I believe, has had some issues with keeping the LFS moist though.Yes, I've been having some moisture issues on both ends of the spectrum. Initially I was following the advice that was given to keep the LFSM in some standing water at all times. This resulted in some rot starting on one of the LFSM plants (I'm trying to recover it, but it appears to be slow progress, if there's progress at all). After I noticed that I cut back on the watering. Unfortunately it's difficult for me to keep the LFSM from drying out since I have to be at work all day. In addition to that we have very intense sun here in CO and even with "hardened" VFTs they all get sunburn out here. That makes the recovery period for my plants quite a bit longer. I finally have one in Peat/perilite coming around and putting up healthy looking growth and I believe one that was in the sphagnum is starting to make a comeback as well. All of the plants I have are growing in a large east facing window in 16oz Styrofoam beverage cups. I plan to move them to a west facing window that gets more sun once I'm sure they're happily rooted in.
jamez wrote:California has a more intense sun than CO.Sometimes the high-altitude sun in the mountain states, with less atmospheric diffusion and buffer, can seem awfully intense.
jamez wrote:Just looked it up. The light intensity is identical.Where did you look it up, and what definition or type of measure of "intensity" are you referring to?
Steve_D wrote:I agree with Steve. The sunshine out on the plateaus of New Mexico is VERY intense. 24000+ foot candles 310 days per year. Great for a solar power farm. No so great for skin cancer rates. It was fscking hard to keep things alive in my greenhouses there compared to my greenhouses in SoCal.jamez wrote:California has a more intense sun than CO.Sometimes the high-altitude sun in the mountain states, with less atmospheric diffusion and buffer, can seem awfully intense.
209 wrote:It might give you better information on light intensity instead of UV intensityPure light intensity sure, but UV is what burns leaves. Plants grown in a green house will burn if you toss them out into the sun because the glass blocks the majority of UV-A and all UV-B. Either way, to be fair I present: solar intensity for solar power
95slvrZ28 wrote:209 wrote:It might give you better information on light intensity instead of UV intensityPure light intensity sure, but UV is what burns leaves. Plants grown in a green house will burn if you toss them out into the sun because the glass blocks the majority of UV-A and all UV-B. Either way, to be fair I present: solar intensity for solar power
209 wrote:The next time that I run into a nerd from UC Davis I shall pick their brain about plants' reactions to UV-A and UV-B. Thanks for the idea for a fun discussion!UV-A really isn't harmful to the plants (from what I've read). Plants actually get a reasonable amount of photosynthetic benefit from UV-A. UV-B however is harmful to the plant tissue, just like in humans. UV-B is high enough frequency it causes near instant chromosome mutation in human dermal tissue. Although I don't know the exact mechanism (biology is not my specialty), it seems reasonable to believe that it's a function of the frequency of the light and the structure of DNA that causes such easy mutation. I assume the same goes for plant tissue since DNA is DNA. In plants it may also cause damage to chlorophyll, but I haven't really looked into this much. If you can find more information with more detail I'd love to know!
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