By Stephanie – West Seattle Flower Farm
I went on a ranunculus planting frenzy this February after panicking at how many empty beds I still had to fill.
As usual, I presprouted most of the corms in trays in late January and let them sit in damp soil in a cool, dark corner of my garage. After about three weeks, I forgot about them. By the time I checked, they had already pushed out green foliage.
Presprouted ranunculus in trays, wanting to be planted outside
With seven trays full of ranunculus that urgently needed to go in the ground, I felt VERY overwhelmed at Past Me’s ranunculus-planting ambition. I panic-texted Lofi, my lovely farm hand, and paid her to come help me for a few hours so we could get them planted before they completely outgrew their trays.
The final 300 corms went in the ground in mid-February, officially filling every inch of space I had allocated for spring.
If you’re wondering whether ranunculus can survive winter in Seattle while enduring a healthy dose of neglect — they can. I’ve planted over 1,000 corms from October through February in zone 8b/9a, and they’re thriving without a high tunnel.
Here’s what I’m seeing in real time:
So far, the 1,000+ ranunculus I’ve planted over the past few months have loved our cold, damp (yet relatively mild) February weather. Some of the earliest successions have been in the ground for four months already and look ready to leap into spring the moment we get more sunshine and heat.
This year I planted several varieties — Romance, Aviv, Tecolote, Amadine, Butterfly, Picotee — in just about every color I could justify.
A handful of ranunculus blooms
My long-term goal is to create an online database comparing different ranunculus varieties so I can recommend the best ranunculus for Seattle gardens — varieties that thrive in our Pacific Northwest climate and make incredible bouquets.
In the meantime, I’m documenting everything in real time with monthly updates about growing ranunculus in Seattle and the surrounding Pacific Northwest (zone 8b/9a). I want you to replicate my successes — and avoid my screw-ups.
I planted ranunculus from fall through late winter and trackedhow they handle rain, cold snaps, and whatever else our unpredictable winters throw at them. Each update reflects what’s actually happening in my garden right now, so you can decide when and how to plant ranunculus in Seattle with more confidence.
You can read my January update on growing ranunculus in Seattle here.
Do Ranunculus Need Row Cover in Seattle (Zone 8b/9a)?
Row cover is nice to have, but not necessary for growing ranunculus in Seattle.
I use it on most of my beds. It helps protect the plants from birds digging around and adds a layer of insurance if temperatures dip below freezing for several days in a row (which hasn't happened this year.) It also acts as a windbreaker, which hopefully means longer and stronger stems come spring.
A bed of Butterfly ranunculus, planted out in Seattle in mid-December
As an added bonus, it has prevented my neighbor’s cat from treating my flower beds like his personal litter box.
Some of my ranunculus have row cover and some don’t. I never quite got around to putting it over a few of my raised beds — and since it’s a nice-to-have rather than a need-to-have and the temperatures have mostly been in boring-and-mild 40ish degrees, I didn’t worry too much about it.
An Unwanted Visit From a Rat
Other than the cat turds, the only real annoyance this season was a rat that snacked on a few corms I had growing up in small 3-inch pots outside.
The rat, unbeknownst to me, later got stuck in a garbage can. When I went to move the can, it launched itself out and flew toward my face. I screamed like I was being attacked by Michael Myers and windmilled my arms hysterically as it landed on the ground and scurried under the fence.
Other than that horrifying and traumatizing run-in with Seattle’s wildlife, the critters have mostly left my ranunculus alone this winter.
Preplanning for Losses When Planting Ranunculus in Winter
This season, I presprouted about 95 percent of my ranunculus corms indoors, rather than planting them directly in the garden. I learned a VERY hard lesson about presprouting ranunculus this year, but starting them indoors meant I ended up with very few empty spots where they didn’t come up.
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Potted up ranunculus, waiting for a new home
I did lose a handful of plants after planting out the presprouted corms, which I expected. Because I grow in such a small urban space, every available spot feels precious, so I hate seeing gaps in my beds.
I presprouted extra corms intentionally and I plan to tuck them into any holes this week.
When to Plant Ranunculus in Seattle: Comparing Fall and Winter Plantings
One of the most exciting parts of planting ranunculus over the last four months is watching them grow despite grey skies, short days, and a whole lot of rain.
I began presprouted in early October and planted multiple successions through mid-February before I completely ran out of room.
The difference in foliage between the waves is fascinating.
The October plants look almost unruly while the January ones are compact and polite.
This bed of Aviv ranunculus was planted in early October
Meanwhile, this bed of Amadine ranunculus was planted in mid-December
Even over the course of the last month, there's been noticeable change in foliage growth.
Here’s what one bed, planted in late November, looked like on 2/27/26:
This is what that same bed looked like in mid-January, about a month prior:
Can You Grow Ranunculus in Winter in Seattle?
The ranunculus I planted from fall through late winter are all thriving in our climate. The foliage volume varies depends on the variety as well as when they went in the ground. But everything appears healthy so far.
My biggest takeaway so far about growing ranunculus in Seattle: you can plant ranunculus throughout winter (as long as we’re not facing an extended deep freeze) and they don’t require any sort of extra protection to survive.
Despite some of the early successions having thick, almost wild-looking foliage, I don’t expect to see flowers until April. Ranunculus thrives in urban gardens, and you don’t need a high tunnel (or even a low tunnel) to enjoy beautiful blooms in the spring.
Will the earlier planted successions of ranunculus bloom earlier? I don’t know. I’ll let you know in my March update if buds start forming.
For now, all the ranunculus are a lush green and very much alive — which feels like a win for February.
FAQ: Growing Ranunculus in Seattle
Can ranunculus survive winter in Seattle?
Yes. In zone 8b/9a, ranunculus can survive winter outdoors as long as temperatures don’t stay below freezing for extended periods.
When should I plant ranunculus in Seattle?
You can plant ranunculus from fall through late winter. I’ve had success planting from October through February.
Do ranunculus need a high tunnel in the Pacific Northwest?
No. While high tunnels may produce earlier blooms and longer stems, ranunculus can grow in open urban gardens without tunnels.
More Ranunculus Resources
Check out my resource page How to Grow Ranunculus in Seattle (Pacific Northwest Guide for Zones 8b and 9A). It’s is an all-in-one resource for how to grow ranunculus in Seattle, the Pacific Northwest, and similar climates to USDA Zones 8B and 9A -- where winter rain, cool temperatures and the occasional frost are the norm.
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