Monday, April 30, 2012

A Living Salad Wall

A neighbor of mine is interested in installing a vertical garden, or living wall, to cover a concrete wall in his back yard. As he and I have been doing research and talking about this project, I've become inspired to do a little experimenting of my own.

I bought one of Bright Green's GroVert living wall planters (Amazon affiliate link) to see see how their system works. This 10-cell, polymer panel measures 8" wide, 18" tall and 4" deep. Multiple panels can be linked together to create a solid living wall.
The cells of the planter are set at a 45 degree angle to keep water and soil from falling out once the panel is mounted on the wall. Very clever! 
At the base of each cell is a "moisture mat" - another smart idea - that holds water and keeps plant roots from drying out. 

Here's the fun part - planting! I decided to fill my panel with salad greens and a few herbs. But there are lots of other possibilities, including succulents, foliage plants and annuals for sun or shade, depending on where you plan to install your vertical garden.

For my "living salad wall" I wanted lots of color and texture, plus I wanted organic starts since I plan to make salad eventually with what I've planted. So I headed to West Seattle Nursery to see what I could find. I came away with lettuces: 'Wildfire Mix,' 'Salad Bowl Red,' 'Winter Density,' a spicy mesculun mix, and endive. I also got 4" starts of cilantro, Italian parsley, French thyme and and 'Apricot Trifle' nasturtium.

I realized as I planted these that it might have been better to have planted less in each cell, and filled in with more potting soil. It is tempting, though, to do just what I did, because a 4" pony-pack fits really nicely into each cell. But no worries, I can easily revise the planting if necessary as the season progresses.

OK, with the planting done, the next step was to water thoroughly and let the panel sit at a slight angle to drain before mounting. While the panel was draining, I installed the bracket to hold the panel onto my fence.
You'll have to furnish your own fasteners. Fortunately, I had some galvanized wood screws on hand.

And here it is - my living salad wall! 

To top it off, I added an irrigator box.
This little box mounts on top of the panel and holds a quart of water. (I'm showing it here with the lid open. After adding water, you'll want to close the lid to keep dirt from getting in.) Small holes in the bottom of the box let water slowly trickle down into the planter, keeping the plants and the moisture pads irrigated. 

It will be fun to see how this works out. As with any gardening experiment, I expect some plants to do well and others will need to be replaced. If I get a few salads out of it, I'll consider it a success. Regardless, the planter and irrigator will still be around for me to use in another season. 

Saturday, April 28, 2012

Changing My Mind About Spirea

I've never been a fan of spirea. When I hear the name, what comes to mind is one of the big, sprawling bridal veil varieties (Spirea cantoniensis, S. prunifolia, or S. x vanhouttei). These plants produce masses of white flowers in spring that, to me, smell unpleasantly musty. I don't want to be around them.

But there is a mound form of spirea (Spirea japonica) that has won me over. There are several plants in this group, many of which stay below 3' tall, all with striking foliage. Cultivars such as 'Goldflame,' 'Goldmound,' and 'Limemound,' certainly live up to their names in the garden. I've been admiring some of these on my regular trips to the local PCC store, where they are planted in the dry stream bed garden out front.
Here you see examples of what I assume are either 'Goldmound' or 'Goldflame' in the PCC garden.

So it happened that yesterday I was working in a corner of my yard that I haven't been happy with for a while. Most of the plants work well together, but there's a spot where nothing has quite fit or been able to thrive. I took out the plants that weren't working and weeded the bed. While I worked, I thought about what might fill in that area and pull it all together. Then I headed up to West Seattle Nursery for more inspiration. Here's what I came home with:
This is Spirea japonica 'Magic Carpet,' a Pacific Northwest Great Plant Pick. It will hold this yellow/chartreuse color all season and will have pink flowers in summer. This vivid foliage, edged with bits of bronze, red and coral, appears to be lit from within. Mature size will be about 2' x 2'. 

I've planted it next to 'Red Fred' heather. We'll see how they get along.