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Your thoughts on my proposed cold frame

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Your thoughts on my proposed cold frame

Post  jimmy cee on 12/8/2014, 9:33 am

After removing my large cold frame and elevating all of my beds I am entertaining thoughts of a new but smaller cold frame.
The smaller section on right will be my proposed cold frame unless I am told that being elevated off the ground approx. 15 inches will have a negative effect on growing plants.
I question this because of the cold snaps we get here in Pa. It goes down to 0 - 10 deg. at times and can stay there for a week or so.
Cold air will surround this frame, so I assume anything over winter will not survive.
However I see no reason not to be able to plant early spring, and run into the late fall with cold crops such as spinach, lettuce, etc.
I have this filled back up and ready for adding compost when the time is ready.
"What say you "


old cold frame removed for elevating bed.
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Re: Your thoughts on my proposed cold frame

Post  boffer on 12/8/2014, 10:54 am

The MM in my TT's,  with hardware cloth bottoms and enclosed hoop houses, ran about 5° cooler than the compost in traditional on-the-ground cold frames in the springtime.  Plants in the TTs developed a couple weeks slower than similar plants in the cold frame.

I've retro-fitted all my TTs with 1" foam board over the hardware cloth, but haven't compared temps since then.

With your board bottoms, your plants should do fine.
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Re: Your thoughts on my proposed cold frame

Post  audrey.jeanne.roberts on 12/8/2014, 1:40 pm

I don't know a thing about that kind of cold to answer you, but they certainly turned out beautifully!
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Re: Your thoughts on my proposed cold frame

Post  jimmy cee on 12/8/2014, 2:56 pm

Boffer, great idea, I'll be able to check the temp. difference between it all this winter.

AJR Thanks, it's been lots of work for me, the one thing that really does it in my case is, being able to think of it all year.
When ever my mind has an idle moment  ( and that's often. ) I'll be able to wonder what's next.
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Re: Your thoughts on my proposed cold frame

Post  Kelejan on 12/8/2014, 4:42 pm

Jimmy, when I looked at your first picture, I thought that there would be moving air under your frame as there was a board missing around the sides.

Then I saw the second picture so thought that problem solved.  If there is air space under the frame, could it not be filled with something so as to retain the ambient temperature  that is in the ground?

That is why in England we kept our barrels of beer in unheated cellars to take advantage of the heat in the ground.Tthat is why we prefer our beer to be cool at 55F and not cold.

Think also of root cellars.
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Re: Your thoughts on my proposed cold frame

Post  sanderson on 12/8/2014, 7:10 pm

Jimmy, Maybe get a sheet of 1-2" packing Styrofoam and plug up/block the side vents (gaps/spaces). Then set your old cold frame over the re-built bed??
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Re: Your thoughts on my proposed cold frame

Post  audrey.jeanne.roberts on 12/8/2014, 9:08 pm

What about something as simple as 6 mil poly stapled around the box during the winter?  Keep the cold drafts out, maybe allow the heat to build up under if it's sunny or keep the heat from the ground in?  Just thinking out loud!
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Re: Your thoughts on my proposed cold frame

Post  Kelejan on 12/8/2014, 10:56 pm

Sounds good, AJR
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Re: Your thoughts on my proposed cold frame

Post  sanderson on 12/9/2014, 12:29 am

Kelejan wrote:Sounds good, AJR
+1
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Re: Your thoughts on my proposed cold frame

Post  jimmy cee on 12/9/2014, 8:31 pm

AJR
thats a great idea, and I have loads of the stuff.
Even styrofoam insulation as Sanderson suggested. would suffice.
I won't concern myself about it this year though, I do not have it built.
Lots of good ideas to consider.
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