Unlikely — Zone Mismatch
neka (Simbo) (zones 8-11) does not overlap with Michigan's zone range (4a-7a). Growing outdoors is unlikely without significant protection.
One zone short — what would close it
Neka Simbo is hardy to zone 8, and the warmest ground in Michigan is zone 7 — 1 zone short. Planted in open ground it will not survive a Michigan winter. To grow it here, grow neka simbo in a container and move it under cover for the coldest weeks, or give it a greenhouse.
Season extension and overwintering under cover both work at this margin. How to buy the weeks →
Zone math from 8-11 (plant) against 4-7 (Michigan). Lift modeled by crop_engine Sprint 20B effective_zone_modifier (+2 zones) via api/fast_sections.py Unlock Engine v2.
Your yard isn't the whole zone.
Michigan spans zones 4a-7a, but your yard sits in exactly one — and slope, tree cover, and cold-air pockets nudge it further. Enter your address and we'll score neka simbo against your parcel's actual hardiness, soil, and sun.
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Zone Comparison
Neka Simbo Needs
- USDA Zones: 8-11
- Frost-Free Days: 365+
- Sun: Full Sun
Michigan Has
- USDA Zones: 4a-7a
- Last Hard Freeze (28°F): Apr 19 - May 8
- First Hard Freeze (28°F): Oct 12 - Oct 31
- Annual Rainfall: 28-38 inches
- Common Soils: Sandy loam, Clay loam, Muck
Plant Zone Range (zones 8-11)
Preferred Soil pH
Plant data: USDA PLANTS Database / Growable Ground plant catalog. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant Neka Simbo in Michigan
The frost window
Across Michigan, the last spring hard freeze (28°F) clears between Apr 19 and May 8, and the first fall hard freeze lands between Oct 12 and Oct 31 (NOAA Regional Climate Centers ACIS, 1991-2020). Counting from the latest last freeze to the earliest first freeze, that's a 157-day window you can count on — up to 195 days on a mild site in a kind year. That marks the hard freeze, not the last light frost, so tender transplants usually wait another 2-3 weeks.
Winter standing
Michigan runs as cold as USDA zone 4, and no sourced winter-hardiness floor is on record for neka simbo, so this page does not state whether it overwinters here — and gives no fall establishment date on the strength of a guess. Whether neka simbo is a permanent planting or a replant-every-spring crop for you turns on your own zone within Michigan; check its hardiness range against that before treating it as long-lived ground.
Timing tuned to sub-state frost dates — Luce County, not the statewide average.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
The zone check says neka simbo does not survive a Michigan winter in the ground. The season figures below measure a different question — whether it could finish a season here at all — and they only bear on Michigan under protection.
Frost-free days
Neka Simbo wants 365+ frost-free days; a typical Michigan site sees ~186 (NOAA Regional Climate Centers ACIS, 1991-2020) — 179 days short of what it needs. A typical Michigan season does not carry this crop to harvest outdoors, and a gap that size is not one an earlier sowing date or a faster cultivar closes; growing it here means growing it under cover.
GDD and chill-hour figures are computed from PRISM 1991-2020 monthly climate normals; frost-free days from NOAA Regional Climate Centers ACIS, 1991-2020. Each is the state median across its counties (P25/P75 span the within-state spread). Hardiness-zone range is USDA PHZM 2023.
Soil + Drainage Fit
Neka Simbo tolerates a wide pH range (pH 5-8) — 3 units, acid ground through alkaline — so soil acidity is rarely what limits it in Michigan. A soil test is still worth having, but for what else it tells you about this site, not to clear this plant. It will grow across that whole span, but it does best between pH 5.5 and 7 — worth knowing before you decide whether a Michigan soil test result is a problem or just a number. Drainage matters: this plant wants well (dry spells). If your Michigan site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Your land, not the state average
SSURGO maps about 29.4% of Michigan as poorly or somewhat-poorly drained, and the class flips parcel to parcel. Neka Simbo sits mid-range for drought tolerance, so either extreme can cost you — your soil map unit, not the state average, is the real answer.
Check your parcel → Source: USDA NRCS SSURGO.
Plant pH and drainage requirements from USDA PLANTS Database. Michigan soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
Neka Simbo in Michigan — Quick Answer
- Verdict: Unlikely — Zone Mismatch
- Plant Zones: 8-11 (USDA PLANTS Database)
- State Zones: 4a-7a (USDA ARS PHZM 2023)
- Growing Season: 28°F hard freezes about Apr 19 - May 8 to Oct 12 - Oct 31 (NOAA Regional Climate Centers ACIS, 1991-2020)
What Else to Consider for Neka Simbo in Michigan
Zone compatibility tells you about winter cold survival — but Michigan growers also need to think about:
Lake effect weather creates highly localized microclimates
Short northern season (100-120 frost-free days in UP)
Sandy soils in western MI drain too quickly
Growing neka simbo here specifically
Neka Simbo rates to USDA zones 8–11 and is hardy to about 60°F, but cold isn't the risk in Michigan — wet is: with roughly 29.4% of its soils poorly-drained (SSURGO), soggy ground rots the crown.
Give neka simbo a raised bed or mounded row with coarse amendment so its crown never sit wet. How to handle it →
What to actually do about these — and the constraints that apply to every Michigan grower, not just neka simbo — is covered on the Michigan growing guide.
Timing shifts within Michigan
Michigan isn't one climate. In Luce County, the last hard freeze (28°F) holds until about May 22 — roughly 27 days later than the recorded state median — so plant neka simbo to your county's window, not the statewide date.
Neka Simbo needs about 365 days of frost-free season to complete its cycle. No Michigan county gives it that outdoors: even Berrien County, the state’s longest season at 223 frost-free days, falls 142 days short — so it needs transplants, a short-season variety, or covered growing.
Across Michigan’s 83 counties the frost-free season runs from 126 days in Iron County to 223 days in Berrien County — a spread of 97 days, which is why a single statewide planting date misleads. The median Michigan county sees 186 frost-free days, which is 179 days short of what neka simbo needs — so on a typical Michigan parcel this is a transplant-or-protect crop, not a direct-sow one.
County last-freeze dates and frost-free day counts: NOAA Regional Climate Centers ACIS (1991-2020), county 28°F freeze (earlier than the folk 32°F "last frost"). Neka Simbo's 365-day requirement: USDA PLANTS / Growable Ground plant database (minimum frost-free days). A parcel report resolves your address's own frost dates.
Pollinator + Wildlife Value
Neka Simbo draws honeybees and native bees (moderate value, Growable Ground Plant Database). Planting it near vegetable beds can lift fruit set on neighboring crops. Outdoors, neka simbo can only work that bloom inside Michigan's frost window — roughly 186 days, opening after the last 28°F freeze (Apr 19 - May 8) and closing at the first (Oct 12 - Oct 31), per NOAA Regional Climate Centers ACIS, 1991-2020.
Michigan Cooperative Extension
For Michigan-specific cultivar recommendations, planting calendars, and pest pressure for neka simbo, the canonical source is MSU Extension. Their fact sheets carry the local trial data we can't generalize across 50 states.
Common Questions About Growing Neka Simbo in Michigan
When can I plant Neka Simbo in Michigan?
Michigan's last spring hard freeze (28°F) clears between Apr 19 and May 8, and the first fall hard freeze lands between Oct 12 and Oct 31 (NOAA Regional Climate Centers ACIS, 1991-2020). No sourced winter-hardiness floor is on record for Neka Simbo, so this page does not state whether it overwinters in Michigan and publishes no fall establishment date for it — check its hardiness range against your own zone before treating it as a permanent planting.
What hardiness zone is Neka Simbo grown in across Michigan?
Michigan spans USDA hardiness zones 4a-7a (USDA ARS PHZM 2023). Neka Simbo carries a range of zones 8-11, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Michigan site have?
A typical Michigan site sees ~186 frost-free days per year (derived from NOAA Regional Climate Centers ACIS, 1991-2020). Neka Simbo needs 365+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date. In cooler counties like Luce, the freeze-free season runs shorter than the state average, so verify your own county's window.
How should I amend the soil for Neka Simbo in Michigan?
Neka Simbo tolerates pH 5-8 and well (dry spells) drainage (FAO ECOCROP). That is a 3-unit span, acid ground through alkaline, so pH is rarely what limits this plant on a Michigan site — amend for drainage and organic matter first.
Will Neka Simbo actually grow on my specific land in Michigan?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores neka simbo against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Michigan
State-level data is a sketch. Your Growable Ground report scores neka simbo against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your lot that Michigan neka simbo averages can't show:
We read public map data around Michigan — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Michigan neka simbo average
Explore More
Growing guides for neka simbo
Analysis by the Growable Ground research team, grounded in USDA PLANTS, USDA NRCS SSURGO, NOAA Climate Normals (1991-2020), and named Cooperative Extension sources. How we know →
Cite this dataset
Kirchick, M. (2026). Growable Ground Plant Database [Data set]. Zenodo. https://doi.org/10.5281/zenodo.21435643
Licensed CC BY-NC 4.0. DOI 10.5281/zenodo.21435643
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