Be welcome here Speak,
Tennesseeian winter is pretty mild. Now if your arbor was in say Minnesota, you might want a cold house to shelter it from snow pack and -40F nights. And even there I'm not talking indoors.
It sounds like you talk to your tree with nose-to-tree; good! keep doin' just that.
Possible and pretty safe to use spray for small bugs: Insecticidal soap. You could buy it from Safers or make it out of 1 teaspoon of liquid soap to one pint of tap water in a spray bottle. Let me repeat, liquid soap only, not detergent.
The best thing about evergreens like juniper, is also their weak point. They are unchanging. Oh sometimes you'll see a little reddening in the fall which is seasonal and routine. But mostly when you will notice that a juniper is being overwhelmed and looks to be dieing, it is usually already long dead.
You must find a place outdoors where you can enjoy your tree. About Thankgiving you will want to nest it in a box of wood shavings with the top peeking out.
All four seasons you will want to use a chop-stick to check for water-needs, You cannot use a schedule, you must manually check.
Keep picking up this tree. Its your first line of defence against pests, and first line of enlightenment to welcome buggy visitors. An' your going to have both.
Think like a tree
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