Posted on by tonytomeo · 5 Comments

Roots

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In the lower right corner of this picture, next to the fenced garden gate, and just beyond the mown grass and what appears to be a walkway, there is a small clump of bearded iris foliage. No one knows where these iris came from, or for how long they had been there when this picture was taken in the summer of 1969. They were growing in the garden of my great grandmother, in Hoot Owl Creek, just south of Red Oak in Latimer County of Oklahoma. It is unlikely that my great grandmother purchased such non-utilitarian plant from a nursery. It was probably acquired from a friend or neighbor sometime during the half century that she tended the garden prior to 1969. It could have been around even earlier, since my great grandfather’s family first developed the farm as Oklahoma became a territory.

The flowers are an alluringly soft lavender blue, on elegantly tall and lean stems. They are relatively small for bearded iris, and lack any fancy frills or ruffles. In fact, they are quite neatly tailored, with a simple sweet and fruity fragrance that resembles that of grape pop. This iris is probably one of the prehistoric specie of iris that was used to breed modern cultivars. Some of these sorts of iris were known affectionately as ‘grape pop’ iris, but it is impossible to know if or how this particular iris is related.

Many years ago, probably in the early 1980s, my grandmother brought some of these iris back to her home garden in Santa Clara in California. They proliferated enough to share with friends and neighbors. A few went to my mother’s garden, where they also proliferated and were shared with friends and neighbors. Now, my mother’s great granddaughters play in a garden where these same iris will bloom next spring; only a few months from now, but at least six generations from that well outfitted homestead garden in Hoot Owl Creek.

Where will these iris go from here? It is impossible to say. Younger generations are not very interested in horticulture. However, I really doubt that my great grandmother could have imagined that they would have gotten this far. What is funny is that these iris are probably more interesting now to current generations than they were to my great grandmother when she planted them.

Posted on by tonytomeo · 1 Comment

Street Wise About Street Trees

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There is no such thing as a perfect tree. All trees have foliage that one way or another, eventually falls to the ground. All trees have roots that might try to displace something that gets in their way. Many trees are messy in bloom. Some make messy fruit. Except for palms, all trees have branches that can be broken by wind. Just about any tree can be blown over if the wind is strong enough.

This is why the selection of trees that are appropriate to each particular application is so important. Finding trees that provide enough shade, obscure an unwanted view, or perform any specific function is one thing. Finding trees that behave while performing their assigned tasks is something else. There are always compromises. A certain degree of bad behavior will likely be tolerated.

Street trees for a parkstrip between the curb and sidewalk can be the most challenging trees to select. There are so many variables to consider. Many neighborhoods have saved us the trouble of selection by prescribing a specific tree, or maybe limiting the choices to only a few species, whether or not they are actually appropriate. Otherwise, we are on our own, to select whatever we like.

Microtrees might seem like good choices. They do not get big enough to damage a sidewalk, or make much mess. These are trees like crape myrtle, purple leaf plum and photinia (in tree form). These trees can be proportionate to narrow streets, but really do not shade much more than a single parking space. Because they are so low, they need serious pruning for adequate clearance.

Mid-sized and bigger trees like Chinese pistache, honeylocust maidenhair tree and some of the modern hybrid elms certainly cause more problems, but might be worth the bother. They shade curbside parking and part of the front yard nicely. Like small trees, they need to be pruned for clearance, especially over the roadway, but they eventually grow up high enough to be out of the way.

It seems that trees that exhibit some of the better characteristics for street trees are deficient in other ways. Australian willow has very complaisant roots, and is very resilient, but also branches low, and is not much to look at. Fern pine and several oaks are excellent street trees for decades, but eventually get big. Root barriers will delay, but not prevent roots from damaging sidewalks.