Working in the storage unit (down the highway) was my planned activity for the day. However, a long-awaited helper became available so my focus was on “a hole in the ground.” I’m preparing for the yet-to-be-delivered (Internet purchase) Trumpet Vine. ~~ Enjoyed my breakfast “tea” while sitting on the patio. ~~ Puttered in the yard, pulling weeds, filling bird feeders, etc., until our delicious noon meal. Corned Beef, cabbage, potatoes, carrots, etc., and all the residents wearing green for St. Patrick’s Day. ~~ I’m preparing this blog between four and five PM and must confess that I am as tired as if I had dug that hole myself!! Well, I did “fill” the hole!! Pine cones in the very bottom for drainage, composted leaves and pine needles in the middle, last-year’s planter soil to ground level. I’ll use fresh planter soil in the planter around the Trumpet Vine. This should, hopefully, be a good start for the plant?! Why did I do it that way? I don’t know; it just seemed like “the right thing to do.” I’m counting on the vine to be a beautiful asset to my garden. Speaking of assets: I think the new (used/free) wind-sock is a nice addition. ~~ (I’ll remove the awful soil later.)
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Three Quarters & Counting 
It is not advised to add extra things into the hole except for pure soil or soil enhancers (i.e., vermiculite, peat moss) at the time of planting. The items you added will decompose (your compost will continue to decompose) and will be “hot” to the roots and burn the plants due to an anaerobic environment, often resulting in death of the plant or poor growth for whatever life the plant will have. Compost and other items are added to the soil on top of the ground or just a few inches below the top of the soil. You will be very unhappy at what is going to happen to your vine so I sincerely recommend taking out what you put in the hole and utilize those items on top of the soil or slightly below. A very thin layer of gravel at the bottom of the hole is the only thing you should think about in terms of drainage, however, I wouldn’t even recommend that. Plants are very good at figuring out drainage on their own, except for standing water for long periods of time. Good luck!