When to plant · 24 cities · zones 6a–8b
When to plant mustard greens in Utah
Direct sow mustard greens around May 5 — the Utah statewide median, counted from a last spring frost of May 5 across 295 ZIP codes and 136 NOAA stations.
The rule: Direct sow as soon as the soil can be worked in spring, and again in late summer for fall. Seed germinates fastest at 55–65 °F and may stall above 80 °F.
Utah mustard greens, by step
Statewide median last frost May 5, first fall frost Oct 10, 2027 season. Each cultivar's own indoor lead time and days to maturity, same engine as the Plan Builder.
| Cultivar | Start indoors | Sow | First harvest | Days |
|---|---|---|---|---|
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | May 5 | Jun 4 | 30 from sow |
Tight means first harvest lands within two weeks of the median first fall frost. Statewide dates are the ZIP-weighted median of every NOAA 1991–2020 station Utah's ZIP codes resolve to; 3 of 298 ZIPs have no datable freeze and are left out.
Mustard Greens in Utah, city by city
Mustard greens, scheduled from each city's nearest NOAA station — the same dates as its frost page.
| City | Last frost | Sow | First harvest |
|---|---|---|---|
| Salt Lake Cityzone 7b | Mar 31 | Mar 31 | Apr 30 |
| West Valley Cityzone 7b | Apr 8 | Apr 8 | May 8 |
| West Jordanzone 7b | Apr 18 | Apr 18 | May 18 |
| Provozone 7a | Apr 18 | Apr 18 | May 18 |
| St. Georgezone 8b | Mar 14 | Mar 14 | Apr 13 |
| Oremzone 7a | Apr 19 | Apr 19 | May 19 |
| Lehizone 7a | Apr 30 | Apr 30 | May 30 |
| Sandyzone 7b | Apr 29 | Apr 29 | May 29 |
| Ogdenzone 6b | Apr 21 | Apr 21 | May 21 |
| South Jordanzone 7a | Apr 18 | Apr 18 | May 18 |
| Laytonzone 7a | Apr 19 | Apr 19 | May 19 |
| Millcreekzone 7b | Apr 25 | Apr 25 | May 25 |
| Herrimanzone 7a | Apr 18 | Apr 18 | May 18 |
| Eagle Mountainzone 6b | Apr 30 | Apr 30 | May 30 |
| Taylorsvillezone 7b | Apr 8 | Apr 8 | May 8 |
| Saratoga Springszone 7a | Apr 30 | Apr 30 | May 30 |
| Loganzone 6a | Apr 30 | Apr 30 | May 30 |
| Murrayzone 7b | Apr 29 | Apr 29 | May 29 |
| Draperzone 7a | Apr 18 | Apr 18 | May 18 |
| Spanish Forkzone 7a | Apr 25 | Apr 25 | May 25 |
| Rivertonzone 7a | Apr 18 | Apr 18 | May 18 |
| Bountifulzone 6b | Apr 25 | Apr 25 | May 25 |
| American Forkzone 7a | Apr 17 | Apr 17 | May 17 |
| Tooelezone 7a | May 2 | May 2 | Jun 1 |
What Utah mustard greens need
Organic Seed Starter Potting MixMust have
Seed-starting mix is not potting soil with a nicer label — it is finer, lighter, and low in nutrients on purpose, because a seedling's first roots want air and moisture, not fertiliser.
72-Cell Trays with 1020 Bottoms, 5-PackMust have
The cheap black nursery trays crack after one season and flex enough to break roots when you lift them. These do not. Over five seasons the price per use is lower than the throwaways.
AG-30 Frost Protection Row Cover
AG-30 buys roughly 6 °F of frost protection while passing about 70% of light — enough to carry a crop through an early-October cold snap that would otherwise end your season two weeks short.
Ultra-Fine Garden Netting, 10×33 ft, 2 pcs
A hornworm is a moth's decision made in June. Fine mesh over the bed at transplant means the moth never lands, and you never spray anything at all.
6" Micro-Tip Pruning SnipsMust have
Ninety percent of sauce-garden cutting is snipping a pepper stem or a basil node, and a fine-tipped snip does it better than any pruner. Pulling peppers by hand tears the branch.
Digital Kitchen Scale, 11 lb, g/ozMust have
Fermentation brine is a percentage of weight, not a number of spoons. Without a gram scale you are not following a fermentation recipe — you are guessing at the one number that determines whether it is safe.
One-Touch Coffee & Spice Grinder
Dried cayenne into powder in fifteen seconds. Dedicate one to chiles — grind coffee in it afterwards and you will find out exactly how well capsaicin sticks to plastic.
Half Pint (8 oz) Regular Mouth Mason Jars, 12Must have
Eight ounces is the right jar for a sauce you use by the spoonful. Open a quart of hot sauce and you are racing the fridge; open a half-pint and you finish it while it is still good.
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Mustard Greens in Utah: questions
When should I plant mustard greens in Utah?
Direct sow around May 5 at the statewide median; across the state that date runs from Apr 9 in the warmest tenth of Utah's ZIP codes to Jun 1 in the coldest. To cut the freeze risk to one year in ten, count from May 28 instead of the median last frost. Use the city table for your own town.
When is the last frost in Utah?
The ZIP-weighted median of NOAA 1991–2020 station medians is May 5. In the warmest tenth of Utah's ZIP codes the median last frost falls on or before Apr 9; in the coldest tenth, on or after Jun 1.
When will Utah mustard greens be ready to harvest?
Mustard greens planted on the statewide date is ready around Jun 4: 30 days from sow.
More for Utah
- When to plant tomatoes
- When to plant peppers
- When to plant tomatillos
- When to plant basil
- When to plant onions
- When to plant cilantro
- When to plant carrots
Mustard Greens in every state → · Utah frost dates → · How frost-date math works →