Rabbitbrush and Other Shrubs That Carry a Bed
Okay. We've been doing a lot of perennials — yarrow, penstemon, globemallow, blanketflower — and those are great, but a bed full of only perennials tends to look a little scraggly in the winter and a little same-height in the summer. You need something with bones. Something bigger, woodier, that's still standing there in January looking like it meant to be there.
That's what we're talking about today. Shrubs. Specifically the ones that don't mind our soil, don't mind our water situation, and can carry a bed visually instead of just filling in around the edges.
Rabbitbrush is the one I lead with
If you drive up the canyon or really anywhere along the benches in Utah County, you've seen rabbitbrush. It's that gray-green shrub that goes completely gold-yellow in September and October, right when everything else is done blooming. It looks like a weed for eleven months and then it looks like the best thing in your yard for one glorious month, and honestly, I think that's a fair trade.
It wants rotten soil, full sun, and to basically be ignored. It does NOT want a rich garden bed. Give it our regular lousy dirt and step back. Once established it can go long stretches with no supplemental water at all — this is a plant that grows wild on hillsides nobody is irrigating.
A few practical notes if you're adding it at home:
- Buy small. One-gallon size is plenty. It grows fast once it's happy.
- Give it room. It wants to be three to five feet across at maturity, and people always plant it too close to the sidewalk or the mailbox and regret it in three years. Go back and look at your plant tag Ziploc if you don't believe me.
- It can look ragged in late winter before it leafs out. That's normal, not dying. I cut mine back hard in early spring and it comes back fine.
One caution: rabbitbrush can be a mild allergen for some people when it's blooming, similar to the way sagebrush affects some noses in the fall. If you already deal with fall allergies, plant it somewhere you're not standing right next to it, not right by your front door where you're brushing past it every day.
Other shrubs worth carrying weight in the bed
Sagebrush (the ornamental cultivars, not necessarily wild-collected) gives you that silvery color all year and smells incredible after a rain, which around here doesn't happen often enough for us to take for granted.
Fernbush is one I didn't know about until a couple years into this and now I use it everywhere. White flowers in summer, evergreen-ish structure, and it genuinely does not care about our alkaline soil or hard water. I'd put it up there with rabbitbrush for reliability.
Blue mist spirea (caryopteris) is a smaller one, good for the front of a bed instead of the back, blue flowers in late summer right when you're desperate for something to be blooming. This is actually one of my August-gap plants, remember that list I keep on my phone.
The idea with all of these is the same. You're using a shrub as the anchor — something that gives you shape and height and something to look at when nothing else is flowering — and then you tuck your perennials in around it. It's basically the woody equivalent of what we did in Relief Society with that lawn strip. Rabbitbrush and lavender as the backbone, everything else filling in around them.
About soil pH and why I'm not going to pretend
Somebody always asks me at this point whether they should test their soil pH before picking shrubs, because these all supposedly prefer certain ranges. Honestly? I still can't get soil pH testing to feel exact. I bought one of those cheap probes years ago, didn't trust the reading, bought the paper strips instead, and I trust those only slightly more. Mostly what I do is just assume our valley soil is alkaline and hard-water heavy and I plant accordingly. None of the shrubs I've mentioned today are fussy about that assumption being true. That's actually part of why I picked them.
If you want to get precise about it, a soil test through the extension office will do you more good than anything you buy at the store. I just haven't bothered, and my yard is doing fine, so I've made peace with being a little imprecise here.
My opinion on the gravel-everything look
While we're on shrubs, I'll say this again because it comes up: I'm not a fan of the all-rock, no-plant "zeroscape" yard. Bare gravel bakes in the sun, reflects heat back at your house and your other plants, and kills off the soil life that's actually helping everything else survive. A shrub like rabbitbrush or fernbush is doing real work shading the ground under it. Rock everywhere looks tidy for about a year and then it just looks hot. I'd rather have a few well-placed shrubs and some mulch, even if it's a little messier than a magazine photo.
Before next time
Walk your own yard and find one spot that needs a shrub, not another perennial — something for height, or winter structure, or shade over bare dirt. Bring the measurements next week and we'll figure out which of these fits.