August 15, 2013 at 11:53 pm #154341
In school we were taught lollipop sized trees weren’t appropriate as street trees. And yet the project I’m working on (see images) is too restricted for anything but lollipops. So I’m looking for suggestions for species. Here are the particulars:
- USDA Zone 6a (recently adjusted upward from 5 apparently due to global warming)
- full sun
- location can be subject to windy conditions
- xeric species preferred
- narrow sidewalk (about 6′ wide) with power lines overhead at 20′
- limited root zone area
- trees should be high-branching otherwise they’ll obscure a new wall mural
- must be deciduous
- existing ornamental plums shown in images will be replaced
MarkAugust 16, 2013 at 5:51 am #154357Jeffrey Trojanowski,Participant
Wow, very narrow. What about a Pyrus calleryana, either a ‘Red Spire’ or ‘Chanticleer’. They get a little taller than 20′, but they can be pruned to keep a 20′ height.
Good luck with this.August 16, 2013 at 8:19 am #154356J. Robert (Bob) WainnerParticipant
Here are a few suggestions…..(Zone 5)…..but, you’ll need to research each of them to see which trees might work for your design situation.
*Cherry “Kanzan” or “Yoshinio”
*Crabapple (many varieties)
Some of the above suggested trees may get too “tall” for the power line issue.
J. Robert WainnerAugust 16, 2013 at 11:25 am #154355Andrew Garulay, RLAParticipant
Have you considered any top grafted trees like Prunus subhitella ‘pendula’ that will give you your trunk size, stem height, and have limited vertical growth?August 16, 2013 at 12:42 pm #154354
The restriction on height matched with the narrow space, limited root zone and high branching translates into doomed trees that may well be butchered until they die. (Is that too up-beat?)
Also, if the area has been Zone 5 then I wouldn’t be so quick to plan on Zone 6a trees (except these poor things won’t have a long life anyway)
There are relatively few species that will do what you need without regular serious tree-killing maintenance,
Consider Zelkova ‘Wireless’
Difficult to locate, though
Cherries also make sense but not weeping ones (too wide spreading and regular trimming up to open view underneath and get branches out of people’s faces)August 16, 2013 at 2:57 pm #154353Ellis CuckseyParticipant
Brutal restrictions there. Even without the limited rooting area, it seems like the powerlines and the mural are leaving you with a pretty limited range of options. High-branching *and* under 20′ is almost an oxymoron. Could this be a situation where trees just don’t make any sense at all?
If the client is insisting on trees, maybe a columnar crab, like Purple Spire or Dreamweaver.August 16, 2013 at 3:10 pm #154352
MarkAugust 16, 2013 at 3:13 pm #154351
Is the limited root room a given?
Can the paving be replaced to make way for structural soil beneath?August 16, 2013 at 5:11 pm #154350
It strikes me that planting trees that “want” to be 50′ tall and taller under a 20′ line is bad horticulture and bad design.August 16, 2013 at 5:53 pm #154349
Point taken, but I have not been able to prevail upon the client to not install trees, or consider shrubs, seasonal color etc. And budget does not allow for structural soil. Anyhow, appreciate your input.
MarkAugust 16, 2013 at 6:22 pm #154348Phil MooreheadParticipant
Rainbow Pillar Serviceberry.August 16, 2013 at 7:39 pm #154347Jason T. RadiceParticipant
I would suggest understory or pioneer trees like perhaps a honeylocust, hornbeam, serviceberry, Black Tupelo, or Redbuds. All of course will need bottom pruning, and with the limited rooting area, the tops will kind of prune themselves for a long while. Cherrys could work, but are messy and will still need a lot of pruning.
Stay away from top rooting climax shade trees like maples, poplars, or Zelkovas, as they won’t live and will just tear up your sidewalk in futile attempt to survive.August 16, 2013 at 8:00 pm #154346Tosh KParticipant
I’ve seen pollarded trees that might work (Frankfurt’s main pedestrian way has plane trees that maintain branches/leaves in a few feet, above pedestrians but below 2nd story windows).
Acacia, locust, and hornbeam are probably the better options for size and pollarding.
Any way to get a basic structure and try growing vines instead?August 17, 2013 at 10:31 pm #154345
Not intended as snooty, Henry. But this is a site that ought not to have street trees. It is a difficult position for the designer to be in, but they will not work here. And frankly not a single species named by any of us (including myself) suits this site, IMOAugust 19, 2013 at 9:34 pm #154344Andrea AlmondParticipant
i would recommend a redbud, serviceberry, crabapple or hornbeam. but make sure to find a fastigiate/columnar variety. there are several available for each species.
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