Planting a Vertical Garden Arbor with Gutters (Part 3)

This week I've been posting about a backyard project that involves vertical gardening!  It was a fun one that actually went 100% according to plan! (That can't be said for all of my projects!)  Often I end up improvising somewhere along the way.
The project involved putting up an arbor and running spray painted gutters between them to serve as planters.

A commenter asked in one of the previous posts if I thought this would work on an 8 foot span.  The answer: I don't think it would without some sort of extra support.  Once soil, water, plants, and the weight of the gutter themselves is factored in I believe some bowing would occur in the middle of an 8' or longer span.  However it would be very easy to attach a piece of lumber underneath the guttering to provide that support.

For planting the gutter I used a mix of peat and compost then picked two six packs of Wave™ petunias. Purple and white were the colors we picked.  Fortunately pink and purple passed muster with my daughter who might have really preferred the pink petunias.  Wave petunias are known for their spreading and sprawling habits which make them perfect for this gutter garden.  In a few weeks we'll have a waterfall of petunias raining down on top of the 'Powis Castle' artemisia you see in the picture!

Thanks to Lowe's Creative Ideas for inviting me to participate in these projects!  Next month we'll working with one of these two themes:
  1. Good Looking and Good For You - Which involves combining edibles and ornamentals into an attractive and function garden.
  2. Furniture Fun - With this project we'll be sprucing up an outdoor area with a new creative piece of furniture or fixing up and refurbishing something we already have.
Which project do you think I should attempt and what ideas would you suggest?

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