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It may be both the temperature swings and the absolute temps which create trouble.My outdoor 20x23 GH hits 107F in the summer (despite max efforts at cooling with mist/shade cloth,ventilation, etc). The plants are acclimated I guess and there is no apparent adverse effect that I have seen.The smaller the GH the more difficult temp regulation is. If it were me I might sacrifice some humidity to even out the temps. The greater the difference between day and night temps, the greater your internodal length will be..."leggy" plants can be the result.
Nice setup. From personal experience, unless they're super rare poly seeds, I wouldn't waste whatever limited space you have within your greenhouse for mango seedlings. I think my area gets colder than yours in PQ if I'm not mistaken? Aside from recent grafts, I never protect any of mine - none died thus far. Save the space for more rare stuffs
Hi,You should also consider adding some a fan to have some air movement in the enclosure. High humidity and still air can lead to fungal problems.Don't worry too much with temperature, provided it does not go much above 95F or so. I would worry more about pests, such as spider mites. They can cause a lot of damage in a short while.
Quote from: siafu on November 23, 2012, 08:33:31 PMHi,You should also consider adding some a fan to have some air movement in the enclosure. High humidity and still air can lead to fungal problems.Don't worry too much with temperature, provided it does not go much above 95F or so. I would worry more about pests, such as spider mites. They can cause a lot of damage in a short while.Thanks, I have the little greenhouse positioned so I can get some air flow by opening the front and back flaps, but maybe I should open them a bit more than I have been during the day.
Just got my latest electric bill and decided that the plants in my greenhouse didn't need to be so warm at night.I also decided that the outdoor Christmas lights didn't need to be on for so long.
Quote from: JeffDM on December 13, 2012, 08:49:52 PMJust got my latest electric bill and decided that the plants in my greenhouse didn't need to be so warm at night.I also decided that the outdoor Christmas lights didn't need to be on for so long.Maybe you can put some big plastic buckets full of water in the greenhouse (with or without lid) so they catch sunshine in daytime. Then the water warms up and at night will spread the warmth. So you can save energy and get a better average temp in the greenhouse. If you don't use lids on the buckets then you also get a higher humidity.