December 16 will be the first date this winter when temperatures will hit a low of 26, or so Google Assistant tells me. I checked in with my variegated lemon tree to find out how it’s doing in the grow house.
I’m astonished with the new leaf growth. I believe the liquid Grow fertilizer I provided earlier this month is fueling some of the new foliage. Lemon trees supposedly don’t go dormant during cold weather, so I need to keep a constant eye on this tree for any signs of problems. I’m hoping tonight’s cold snap won’t damage the new leaves.
One thing I’m a little frustrated with is the automation that switches on the Vavofo outdoor smart outlet in the tent under specific conditions. I created a script in the Smart Life app to turn on the lights when local temperatures are equal or less than 48F during daytime hours. I’m currently troubleshooting why the app doesn’t fire consistently.
Obviously if I’m not home or paying attention to local climate conditions, I might lose my frost tender plants to cold weather. Turning on the incandescent string lights helps mitigate the freezing temperatures by keeping grow tent temps 4-10 degrees warmer. I may try using IFTTT integration to get this to work reliably. Worse case is moving to Home Assistant and running my own automation server to control my IOT.
Back in October I purchased a Quictent pop-up grow house in preparation of housing my frost-tender plants outdoors, including my first-this-year variegated lemon tree. It took 2 tries to get it right, but in the end I was happy with the results. All I have to say is watch the unpacking video, read the instructions, and watch the video AGAIN so that you don’t encounter problems in setup. I confess that I strayed from the step-by-step order and ended up snapping one of the fiberglass poles, held together by stretchy rope.
I walled off about 32 square feet on the patio with a cinderblock border about 3 blocks high, or roughly 2 feet tall.
I then unpacked and erected the tent, though I found it helpful on the 2nd try, to have an extra pair of hands setting it up. Strong winds can make setup challenging.
Originally, DH suggested a pass through, so we cut 4 pieces of lumber, stained them, and purchased additional planter blocks to create something of sliding system for a removable wall.
I picked up a wifi enabled mini hygrometer made by Inkbird to monitor night time internal temperatures. I soon learned that on frigid nights, the grow house really didn’t offer much insulation. I would have to find a way to heat the space.
String lights to the rescue. Or not! I dug through closets hunting down old Christmas string lights. Meanwhile, DH put together a light stand constructed from PVC pipes and erected it inside the grow house.
Unfortunately, the mini string lights didn’t produce enough heat to impact overnight temperatures inside the grow house. But it looked pretty enough!
Blue and white mini string lights, just not enough heat
Temperatures stayed anywhere in the range of 4 to 10 degrees above local outdoor overnight temps. And the tent was brighter too. Overall I used a total of 3 25ft string lights, connected to a splitter on the power cord end. The number of bulbs limited the number of strings that could be connected together, without blowing a fuse–unlike the LED strings that I had hung previously.
On the wall end, the power cord connects to a wifi-enabled dual headed outlet rated for outdoor use. It was handy to schedule times when the lights turned off and on. I could also run automation to turn on the lights when local temperatures dipped below a certain threshold.
All in all, it was a learning experience setting up the tent and heating it. Time will tell if this outdoor grow house setup can endure the harsh winter elements. The only grievance I have is with the delicate C9 bulbs whose filaments break very easily at the slightest blow. I discovered this after I tested every light beforehand, only to find bulbs damaged post installation.
