Wyoming gardeners can grow asparagus successfully, but the real question isn’t whether the plant survives here. It’s whether the spot you pick still makes sense a decade from now. Asparagus goes into the ground once, as crowns, and stays there for 10 to 15 years of harvests without being moved. The only hard requirement the plant carries is that the soil drains. Everything else, the timing, the watering, the frost dates, builds on top of that single fact.
The short answer
An asparagus bed isn’t a tomato patch you rework every spring. The crowns go in once, and that planting decision plays out over 10 to 15 years of harvests. That timeline changes what “good soil” means here, which raises the real question: Will Wyoming Soil Hold an Asparagus Bed for Fifteen Years? A drainage problem you might tolerate for one season on a crop you replant annually becomes a problem you live with for a decade when the crop in question doesn’t move.
The soil that USDA NRCS lists as representative of Wyoming is the Forkwood series, an Aridisol typical of dry-climate ground, usually alkaline and often carrying salts near the surface. Its surface texture runs 42 percent sand, 20 percent clay, and 38 percent silt, a loam-to-silt-loam mix, with organic matter around 1.5 percent and a surface pH near 7.2. NRCS classifies it as well drained. On paper, that clears asparagus’s one requirement. But a state soil series describes what the mapped ground tends to do across the state, not what’s under any one backyard. River bottoms hold water differently than hill country, and any lot a builder has scraped or filled will behave differently than either. The only way to know your own ground is a soil test or a simple observation: dig a hole a foot deep, fill it with water, and see how long it takes to disappear. If it sits for more than a day, that spot needs help before crowns go in, either a raised bed, several inches of compost worked in ahead of planting, or a different location entirely.
Utah State University Extension names four commonly available varieties, distinguished only by sex, with no published claim about flavor or yield differences between them:
| Variety | Sex |
|---|---|
| Jersey Giant | All-male |
| Jersey Knight | All-male |
| UC 157 F1 | Male and female |
| Purple Passion | Male and female |
Crowns go into furrows about 8 inches deep, then the furrow is backfilled gradually, roughly 2 inches of soil added every other month across the first year, rather than filled in all at once. No spears are cut in year one or year two. When to Plant Asparagus Crowns in Wyoming matters just as much as how they’re planted, since getting the timing right sets up everything that follows. Harvest doesn’t start until year three, and even then it’s brief: about 4 weeks that first cutting year, extending to 6 weeks the year after, then 8 weeks once the bed is fully established. The cue to stop each season isn’t a date on a calendar, it’s the spears themselves: once most of them come up thinner than a pencil, harvest ends for that year and the plant is left to grow fern to feed the crown for next spring.
Will the summer here water it for you?
An asparagus bed asks for 1 to 2 inches of water every other week for its first two years, then eases to once every three weeks once it’s established. Set against Wyoming’s summer normals, that request outpaces what falls from the sky most years.
- What a new bed needs: over a 12-week summer, watering every other week at 1 to 2 inches works out to roughly 6 to 12 inches of water across June, July, and August.
- What Wyoming’s summer actually delivers: NOAA’s 1991-2020 climate normals put summer rainfall at about 5.8 inches total across June, July, and August, broken down as 2.16 inches in June, 2.11 inches in July, and just 1.52 inches in August, the driest of the three.
- The gap in year one and two: even at the low end of the bed’s needs, natural rainfall covers roughly half of what a new planting is asking for, and August’s 1.52 inches falls well short of a single 1-to-2-inch cycle repeated every other week.
- What an established bed needs: once the every-three-week schedule kicks in around year three, total summer demand runs closer to 4 to 8 inches, a range the region’s 5.8 inches can come closer to matching, though August’s dry stretch still tends to fall short on its own.
- What that means at the spigot: these are climate normals for one reference station, not a forecast and not a reading from your own yard. A rain gauge on the actual bed, tracked through a summer or two, is what tells you whether supplemental watering is occasional or routine on your particular soil and slope.
When to put the crowns in
Crowns go into the ground in early spring, timed around the last chance of a hard freeze rather than a fixed date on the calendar. For the reference station NOAA tracks in this region, the mean date of the last spring freeze at 32°F falls somewhere between May 7 and May 18. That’s a probability band built from three decades of data, not a guarantee, and it’s worth treating it that way: a mean frost date is an average, and any given spring can arrive earlier or linger later than the range suggests. At elevations around 6,000 feet, which cover a large share of the state, growers are typically working with something on the order of 130 frost-free days, and frost remains possible in any month at the higher elevations. That reality is part of why gardeners here lean on row cover and other season-extension tools rather than treating a single planting date as fixed.
Waiting until the soil has warmed and the worst freeze risk has passed, generally sometime after that early-to-mid-May window closes, gives crowns a better start than rushing them into cold, wet ground. The furrow depth and gradual backfill schedule described above apply regardless of the exact week chosen.
Seed is the alternative to crowns, and it’s the slower route: rather than starting with a year-old crown that already has stored energy, seed-grown plants begin from scratch, which pushes the whole timeline, including that first no-harvest stretch, out further before the bed reaches the point where cutting can begin. For most home gardeners weighing a 10-to-15-year investment, crowns remain the more common starting point, with seed reserved for growers willing to trade a longer wait for more control over which plants end up in the bed.
Checking this against your own county
Everything above describes what the region tends to do, on average, at one reference station and one representative soil series. Your actual garden sits on its own soil, at its own elevation, with its own microclimate, and none of that shows up in a statewide normal. The reliable next step is the University of Wyoming Extension, reachable through uwyo.edu/uwe, which can connect you with county-level guidance, soil testing options, and frost-date data specific to your part of the state rather than a single weather station’s average. A quick call or visit before you dig that first furrow settles the questions a state-level soil series and a statewide climate normal simply can’t answer on their own.
Common questions
Can asparagus grow in heavy clay soil in Wyoming?
Only if drainage is fixed first. The plant’s one firm requirement is well-drained soil, and standing water around the crown for extended periods is the main way an asparagus bed fails. A raised bed or generous compost worked into the planting area ahead of time is the usual fix when a soil test shows poor drainage.
How long before an asparagus bed produces a full harvest?
No spears are cut in the first two years. Year three allows about 4 weeks of harvest, year four extends to about 6 weeks, and by year five the bed can typically support a full 8-week harvest season, provided the fern was allowed to grow undisturbed after each year’s cutting stopped.
Does the pH of Wyoming’s state soil mean I need to adjust mine for asparagus?
The Forkwood series carries a surface pH near 7.2, but that figure describes one representative soil series mapped across the state, not a target number for asparagus specifically, and no pH requirement for the crop is published in the source used here. A soil test on your own bed is the only way to know where your ground actually sits.
Is there a difference in flavor between the all-male and male/female asparagus varieties?
Not according to the extension source used here. Jersey Giant and Jersey Knight are identified only as all-male varieties, and UC 157 F1 and Purple Passion as male and female, with no flavor, yield, or preference claim attached to either group.