When to plant in Morgan Hill, CA
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Morgan Hill, California — is derived from the closest NOAA station with complete climate normals.
With about 276 frost-free days, Morgan Hill supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Morgan Hill's nearest full-normals station sits about 16 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. In zone 9b, frost is a minor factor for Morgan Hill — most perennials thrive, and annual vegetables can go out early and stay late.
The average last spring frost in Morgan Hill is now 9 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
GILROY · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Morgan Hill’s own odds, recorded at GILROY.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 1 | Apr 4 | Mar 4 | Oct 20 | Nov 10 | Nov 29 |
| 32°F | Apr 4 | Feb 24 | Jan 23 | Nov 10 | Nov 27 | Dec 18 |
| 28°F | Feb 19 | Jan 16 | Dec 22 | Nov 24 | Dec 12 | Jan 14 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Morgan Hill, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Morgan Hill planting FAQ
When is the last spring frost in Morgan Hill, CA?
Morgan Hill's average last spring frost falls near February 24 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Morgan Hill, CA?
The first fall frost in Morgan Hill typically arrives around November 27 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Morgan Hill in?
Morgan Hill is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Morgan Hill?
Morgan Hill has about 276 frost-free days — a long growing season — between the average last spring frost (February 24) and first fall frost (November 27).
When should I plant tomatoes in Morgan Hill?
For Morgan Hill, sow tomatoes indoors about December 30–January 13 and move the seedlings out around March 3, after the last spring frost.
Never miss a window in Morgan Hill
An email when it’s time to start seeds, transplant, and sow — timed to Morgan Hill’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Gilroy · 15 km
- San Jose · 24 km
- Watsonville · 26 km
- Los Gatos · 30 km
- Alum Rock · 31 km
- Soquel · 31 km
- Campbell · 32 km
- Scotts Valley · 34 km
Frost dates recorded at GILROY, 16 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Morgan Hill, CA — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00043417. Retrieved from https://blissgarden.com/california/morgan-hill.