I have heard people make mention this, but has anyone ever done it? What kind of results did you get? How deep do you make the cut(the trunk is about 1-1.5 inches thick), I would guess about 1/16" or enough to go through the outer bark layers. And, would you make the cut just the width of the leaf scar?
I have a Peter's Honey which is ~3.5 yrs old. I bought it as a thick whip which was about 3' tall at a local nursery, it was a Monrovia plant. It was nice because it had some figs on it already, one of which was ripe so I got to taste it and was sold. I topped it at around 30" during it's first dormancy and repotted it to a 12 gal pot. The following spring I trained out four branches relatively equally spaced radially, but they are all in the upper 1/4 of the main trunk.
Last year I thought I let it over crop, it had many double figs. Some figs were very good quality, most were not, this was at least partly due to poor timing of a lot of rain. The over-all growth of the tree I didn't think was that great, most of the branches only grew about 4-5 inches. They were nearly covered with figs though.
This winter when repotting trees and such, I removed the stake I had in the PH pot for support because I figured it wouldn't need it anymore. The tunk was still a bit unstable. So I replaced the stake and I chalked that up to the suspected over-cropping and the tree didn't have good root or top growth because all those figs. Fast forward to now, the tree is in the same pot and getting the same fertilizer regimen as all my other trees which are solidly anchored. It is still not the most stable tree. I removed all the 2nd of the double figs this year and only allowed 3-4 figs per branch, hoping for a bit more vegetative growth during the fruiting stages. It's the same as last year so far, very healthy looking growth in the spring, slow but steady. After about 5 leaves per branch and internode lengths of 3/4-1", no more vegetative growth, just growing the figs.
So, I guess at the moment I'm thinking..if the tree is a slow but consistent grower, which is reliable for the amount of figs it produces per branch. I need more branches(I really should call them a spur given their length), which the tree it is not eager to put out. Thus if I can make the cuts and add 3 more braches in the middle third of the tree, I should be good.
The tree does put out branches at and just above soil level, there are 3 now but they all are thin little weaklings so far. One of them has been there since I bought the tree, it has hardly grown and is still thinner than a pencil. That branch had a couple worthless figs on it last year, none this year. I'm cutting all those little ones off this winter. For now, I guess I'm leaving them to harvest a bit of sun energy.
So, do you think this sounds like a good idea? In case you were wondering.. the soil, it's the same as all the other trees also. We shall see at the end of the season how solidly anchored the tree is. I don't think there are grubs in the soil. The leaves never wilt or look stressed. The tree just grows slow, and I really thought that by limiting the crop this year it would increase the growth.