arimuse

hubs made me a greenhouse out at the farm, but we had to rethink it - the snow got it and then the wind blew it in. This is lowcountry SC, so there shouldnt have been any snow!
In the summer we planned on rolling up the plastic on the sides - the temps are terrible inside. Its really good for wintering over tomatoes and green peppers. Wanted to try and grow lettuce, too. Wanted to use it to start seedlings, too sharet

GypsyRse1

Had the same problem....We installed an attic cooling fan, heat/temp activated. Can be set to exhaust heat over certain temps. Not expensive at all. We also use light shade cloth to cut some of the heat over the part that gets extreme afternoon sun and it still gets plenty of light.

Chasing Hawk

We built ours last fall. I finally got to use it this spring and summer. It is just to convenient to put your plants from the nursery in there until planting time. Also a nice way to acclimate them to our climate.

Rejoyce

Yes, I have a greenhouse for almost 15 years now. And I love it. I ordered it from a company that had a display at a big flower show in Philadelphia, PA. It's 2-ply plastic and not at all energy efficient. It has a propane heater, and I used to heat it all winter, (for houseplants) but when prices went up I could no longer afford that. Now I heat it in March to start seeds. I love growing seeds and plant them in my yard. As well as giving some plants to friends. Rejoyce >

Ramona Byrd

I have 2 large greenhouses. Yes you need fans, ventilation, misters and even an evaporative cooler in the summer if you plan on growing plants and keeping them alive.
-----------------------------------------------------------
You've named every one of the helps I've seen in the commercial green houses I've seen in past years. I can still feel the chill on my skin just thinking of that lovely misty building.

I bought some of the misting hose some years ago for the dog yard. After a few years the calcium in our water clogged it up, which was a problem we had at the nursery. We have a LOT of calcium, among other things, in our water.

One thing my DH accidently found that caused some of his plants to grow faster, was to use blue glass on the top roof. A tree branch broke some glass on the greenhouse that held the very most expensive plants he had (of course!!) and since he was called in late at night, he searched around old storage buildings and found some glass a family member had stored "just in case he wanted to create a masterpiece of stained glass" and DH used them. Turns out in that part of the green house and that part only, the plants grew bigger and much thriftier. Very interesting I thought. I found it's called Color Therapy or something like that.

kbs

Our greenhouse is made of a corrogated plastic panels that have air in them with windows that push open on both sides. We had to put in an electric exhaust fan and it sometimes still gets too warm. We keep a thermometer in there and if it gets hot we put the plants on the ground and prop the door. By the time we plant the first of May it's hard to control the heat.

jaciqltznok

same here..I start my seedlings out there, but they don't do well, because it gets soo hot out there too fast...

IrelandDragonQuilting

I have one that I built out of old windows, I used windows that were still in their frames for the most part so that I could open them up to allow for ventilation. However, a hail storm broke out two windows and ruined the roof, but the insurance company came through and now all I have to do is go get the replacement materials and fix it again, I think this time I will replace the broke glass with plex-glass on that side, might help protect it from the hail. What is weird is where the glass was covered with screens you could see where the hail, the size of golf balls, hit but did not break or even crack the glass.

Candace

Here are my 2 greenhouses. One is 12' x 18' and the other is 18' x 20'.

Alaska

Two open doors and two fans! Even here on our few very warm days (72 degrees!) I leave the doors open & fans on. Our evenings cool it off but it gets hot, but yours! Wow!