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Just set up my very 1st greenhouse...ok, it's actually a "coldhouse" but was looking for any insight into maintaining temp/humidity etc.

It's a 6x8 alum frame with polycarb panels have it mouted on 4x4 beams with gravel for a floor.

I live in zone 6, NW corner of AR in the Ozark Plateau...we've had a nice 2 week spell of 60/70' days and 40/50' nites but have a little cold front coming thru tonite sending temps a little back to normal mid 50 days and mid 30 nites...my other question is if I were to put out some Tomato seedlings that I just potted up in the past few days...do I need to worry about nite time temps in the mid to low 30's without a heat source?

Any and all advice is greatly appreciated!

Simple just add some water storage or even a pile of bricks that will absorbe the day heat! Place the bricks on a insulated surface so the ground does not absorbe their heat! it makes a big difference at night!

Are you saying, put the bricks inside the greenhouse to allow them to warm up or leaving them outside and then putting them inside each day?

Thanks!

You could make your table out of all brick inside the greenhouse and they will hold the heat just like fire brik do in a heater!. Block also work great! Brick heat up faster than water depending on the size of the container!

I'm a greenhouse newbie too. I live in zone 7, but in a micro-climate that gets lower temperatures. I've had tomatoes, and a few other things in my greenhouse for about a week.I do have water to store solar heat, and am still keeping watch on night and day temps.

I don't think I would risk putting tomatoes in the low 30's without a heat source. If it did get that cold, could you put them under a heat lamp, or use a small heater?

Your greenhouse will heat up really fast when the sun hits it, so keep an eye on your day time temperatures too. I have seen my daytime temperatures rise to 107 with it opened up. You will also get different temperature reading, in different locations of your greenhouse.


Hope this helps some.

The water and bricks helps absorbe some of the day heat alo and keep it down some.so it does two things! I have over 500 gallons of water and if the water temp is 50 or more I do not worry about the night outside tempbut I have double plastic which you must have to hold the heat. One layer will not hold it!