So far I find it very hard to turn the adjustment to open more holes or less for ventilation. I held them while my wife forced turn so the respiration holes would be in the open position. I do not know how they work because I just started using them.
THESE FROST GUARDS ARE THE BEST!!!!!!!!! I ORDERED 9 OF THEM LAST YEAR AND CAME BACK FOR 12 MORE JUST THIS MONTH. WE LIVE IN WILLIAMS, AZ, WHICH IS ABOUT 30 MILES FROM FLAGSTAFF, AZ. OUR ZONE IS 5B. THESE FROST GUARDS PROTECT IN THE WINTER VERY WELL, INCLUDING VERY WELL IN THE SNOW!! THIS PAST SPRING AND EARLY SUMMER WE HAD ALOT OF WIND, AND I FOUND THESE TO BE WONDERFUL PROTECTORS FOR THE YOUNG PLANTS THAT I HAD PLANTED EARLY SPRING. I JUST LOVE, LOVE, LOVE THEM!!!!!
i really like the frost guard protectors. I used them after I planted my tomatoes, the temp was still unstable. they worked great! I'll use them this fall on some of my delicate plants and see how they do.
I live in Colorado and we have terrible wind. I used these frost guards all spring to protect me tender plants. I could not have a garden without these. I can't say enough good things about these frost guards. I am using them this winter to put over small bushes and plants that I usually lose over the winter because of the winds. When these are pinned down, the wind does not blow them off, they stay put. I even had these guards on in June with the tops off just to protect from the winds and the plants loved it, it did not get too hot. I will definitely be getting more.
I purchased 36 of these wonderful items immediately when I saw them in the catalogue. Even though I have not used them as yet, I can tell you that they will be far ahead of sliced bread on the item list of great things in our society. I am anxious to get my plants under the "FG". I have 14 of these being tested in my garden before season starts. In order to monitor the temp inside the FG I drilled a 1/8" hole in the exact center of the top and I can insert a air condition thermomator,close the vents of & know exactly the inside temp in any setting of the vents. I then cut a small pop rivet to fit the hole and no air escapes unless I want it to. By doing this I can rotate the top without any problem. I will also use them for Peppers, Cucumbers & any other plants that I want to start early on in the planting season.
