Thursday, March 5, 2009

Lemon Tree, Very Pretty

Walnut Grove in Lake County
A disclaimer: some of the following images may be offensive to arborists or horticulturists. Children may be able to identify them as somewhat Seuss-esque.
This year's pruning time has come and gone. I almost missed out on most of the action because of my high ideals: I believe that pruning fruit trees requires long-term vision, and the owner of the tree should either 1) be the sole pruner or 2) always have it pruned by the same person. The rationale is that fruit trees can live productive decades if taken care of, but can take years to train in a certain direction. A surrogate pruner might cut off a two-year-old branch for which the owner had high hopes.
But I enjoy the art of pruning, so until I have trees of my own I'll prune any trees for which the owner hasn't created a plan. Step one was our visit to a friends' place in Portland, OR. They have a recently acquired property with a few fruit trees, two of them over 50 years old, maybe over 60. That leaves plenty of time for mismanagement. The pear was probably at least 30 feet tall, water-sprouts and all. A little high for easy harvest. At 10' the main trunk split into two 8" trunks which were racing each other to the heavens. At 20' both of these trunks had been cut to stubs, each of which had a dozen or more branches reaching out. To make a long story short I was aggressive, perhaps overly. I wish I had pictures. With the advice of an arborist who lived across the street I cut one of the two competing trunks halfway down. (The idea is to end up with a tree half the height of the current one, but such a change has to happen over a long period of time with such an old tree.)
The other old tree was an apple, which was less out of shape. It is a shorter story. Essentially, it is said, your fruit tree can be a fruit tree or a shade tree, but not both. So it got thinned mercilessly. Again, the pictures would be great. You'll have to use your imagination after seeing the lemons.
So that was step one. Step two was that, upon our return, Garden Manager Ellen started talking about the lemon trees in the greenhouse needing pruned soon. She always lets interns prune those, because she says they come back beautifully from anything. So last week I went for them.
Not ignorantly, of course. I looked up articles on the internet.
I read an amusing quote recently by the Rev. Dr. Francis H. Wade which goes "The Bible is like a person, and if you torture it long enough, you can get it to say almost anything you'd like it to say."
The internet is like an amiable genius on LSD. If you listen long enough it will run the gamut from the insightful to the utterly incomprehensible. But, like the Bible, it is most easily misinterpreted when you step into the middle of the monologue, not knowing what came directly before or after (and not taking the time to find out).
So I found two main thoughts on pruning lemons, and citrus trees in general. The first is that everything thinner than a pencil should be taken off every year, and you can prune it all off back to main branches. In "the industry" they sometimes cut them back to trunks. The second is that citrus trees don't need to be pruned. They'll take care of themselves.
I disregarded the second because 1) the trees are in a greenhouse and are already touching the ceiling without encouragement and 2) it isn't any fun. So I started pruning, then went back to the internet to check because the tree started to seem a little gaunt. Emboldened by what I re-read, I forged ahead. I took pictures this time.
With the first tree I followed the advice thoroughly. As you can see, the number of leaves left on the tree could be counted on two hands. We had a family of friends visiting about this time, and they were glad to come out to the greenhouse to help tame the wild lemons with me. I'm leaving their names out to protect them. If I get hauled away for tree mutilation I want them to be safe. I'll take responsibility for this one, guys.
They were in charge of two of the other trees, setting a more moderate example for me when it came down to the final two.
Now time for a little educational piece. You might or might not wonder what I did with all the prunings. In Grow Biointensive we try to keep everything in the system, so tree prunings generally either get used as mature material in a compost pile or as the rough material upon which we build the pile. These tree are different, though. I don't know if this is true for lemons as a whole, but Meyer Lemons (the variety we have) produce a bonus crop on their branches: 1-2" thorns that are sharp enough to slice as well as pierce. We handle our compost often enough to not want surprises like this inside.
Last year's prunings got tossed out the back of the greenhouse and ignored.
This year I was going to do the same, but further away. I wanted to provide wildlife habitat, but preferably not right up next to the greenhouse. We have enough rodent problems. I started by moving the earlier pile, which had been increased by weeds tossed on top. Underneath the pile was some very nice compost. Now my plan is to make the new pile further away from the greenhouse, yes, but not to ignore it. Every bit of organic matter is a big help.
Here are some of the tools I used. The Felco pruners at top left and the pruning saw are both indispensable, but the next tool to the right is also very nice. It has pruning shears at the business end, which is on a long, adjustable aluminum pole with a hand-trigger at the other end. Very, very nice. The last tool is powerful but wicked. It has a lopper on the business end of its pole and a long rope. Pulling the rope levers the lopper closed on the branch of choice, but you have to pull hard. This is where it gets wicked. Where do you put the butt-end of the pole to brace it against the pressure? I tried my rib cage last year, but only once. The shock of the successful lopping bruised one of my ribs, so now I steer clear of the thing completely.

I don't know if you can identify with me, but I often find that shortly after I do something new, which I thought I had read enough on, I stumble upon something else enlightening on the subject. So one of the books I later looked at on a whim mentioned that lemons store most of their fruiting energy in their leaves. Hm.

1 comment:

  1. Dan, you are so great! I remember the one winter I got really excited about pruning Dad's orchard, sort of in honor of Grandpa Royer; it was fun to cut off huge branches in the name of progress.

    I really liked your quote from the hon. Rev. Wade; I read that paragraph to Matt so we could giggle together. :)

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