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Arborist Insights

Parking Lot Bioswales On Our Cities

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If you are like me, you park your car and rush to do whatever is on your to do list. Perhaps it’s a sale or a Zumba class. But stop and look at the hard-working bioswale. The plants in it remove your vehicle pollutants, capture carbon and cool the surrounding air. Paved surfaces tend to heat up and act as heat islands.

Water is captured by the plants and slowly soaks into the ground and eventually reaches local streams the way nature intended.
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Note that while periodic weeding normally happens in bioswales, the one pictured below is covered with arbor-chips (free and effective) and Horsetail (Equisetum) is NOT an enemy in this setting.

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Searching for Female Ginkgo biloba Trees

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Have you ever wondered why city boulevards are dominated by male Ginkgo biloba trees? My first field encounter with a female Ginkgo biloba specimen only happened last summer and I wondered why that was.
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It turns out the females produce seeds in a fleshy covering (the sarcotesta) which contains butyric acid. Once fallen on the ground the fleshy parts produce an unpleasant odour; not exactly the best thing for city boulevards. I have seen various descriptions of the smell but why not find out for yourself? If you can find a female Ginkgo.

Vas’ (our Arborist) Favorite Plants… What Are Yours?

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We all have our favorite plants. This is my top three. What are yours?

  1. Davidia Involucrata – aka, Ghost Tree
  2. Doronicum Orientale
  3. Albizia Julibrissen – aka, Silk Tree; once you experience its amazing scent you won’t forget it, it doesn’t leaf out until June!

Why Aerate Lawns?

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IMG_5279Aeration allows more water and oxygen to enter the root zone and thus leads to a healthier lawn. If you only do one thing to your lawn, aerate it!

The picture shows a core sample with minimal rooting. Aeration with proper fertilizer and irrigation schedule would be the recommended course of action.

Hellebores

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Hellebores flower in late winter and early spring when the landscape is still asleep.

If you haven’t already, clip the brown and black foliage. As long as you don’t attempt to move them, Hellebores will warm up your garden every winter and into spring.