TLDR: Old Rotten Apple.
SO FAR -Removed Orange, created 10' mulch ring, revealed root flare, removed suckers.
GOING FORWARD - Remove red this winter, maintain/recover for spring/summer 27', canopy reduction winter of 27'.
Do I need a support/crutch?
Where do I cut back to for the main
Background:
I have no idea just how old this tree is, but our home was built in 1860.
We have 3 acres and this tree wasn't doing great, but it never got the attention it needed over the last 3 years other than trimming of the suckers (which I now know were trimmed to high). This year I took a look at the tree in the spring and kinda wrote it off.
The first picture is hard to make out due to the background canopy of the other trees so I edited a picture quickly to help explain what I've done, and my plan for a way forward.
The orange highlighted part was at serious risk of breaking off, so I cut it off late may this year.
I realized just how cool this tree is and I'm hoping I can at least extend it's life beyond what it had left if I did nothing.
I recently prepared a mulch ring about 10' around the tree. I removed grass, weeds, and a lot of suckers. I now knew it was important to cut them as far back as possible. During careful digging I realized that the whole root flare was 6" below grade. I carefully revealed the root flare as best I could. I used semi-rotted leaf mold. I only had enough for 2-3" and I kept it well away from the root flare.
The trunk rot is extensive. FYI the water in the pictures was from two minutes prior to the pictures. I sprayed the root flare gently to remove all the cacked in dirt so I could get a better look (I didn't spray in the rotten area).
On the back side of the tree I removed the loose organic matter from the ground inside the trunk. I removed some leaves and debris, but I didn't remove any bark, and I know not to try and fill or fix this area, and that air flow is what it needs.
The main branch of the left side of the tree (highlighted red) is hollow and runs like a pipe down into the main trunk and out the opening in the rear. There are a few signs of life in 2 spots in a couple lower branches, but otherwise everything is dead. My plan is to remove this whole side (In numerous cuts, to relieve some weight).
From my research I need to try and elevate weight on the right side (green highlighted), but I should do as little as possible until the following winter after it's had a whole growing season to recover. There's about 3 dead branches that I plan to remove (about 10-15% of the green side.
Spring/Summer 2027 I plan to basically plan to keep the mulch ring maintained, cut back suckers often, and deep water 1 time a week during hot periods.
Winter 2027 I prune the canopy back to a more manageable size so that there's less weight on the trunk. Focussing on branches that are dead/unhealthy, crossing, inward facing, straight up/down.
That's my plan. Here's my questions:
Am I wasting my time? Can I realistically extend it's life?
Should I create a branch support/crutch under the 90 degree branches on the right side?
When bringing back the main red branch to the main trunk where should I bring it back to?
Should I fertilize at all next year?
Any advice or help is greatly appreciated 👍