USDA Hardiness Zone 10a
Frost Dates for 94062 — Redwood City, California
Averages from Woodside Fire Stn 1, Ca US, the nearest reporting station, 1.2 miles away.
Plant tender crops after February 25, and expect the first autumn freeze around November 25. That leaves about 274 frost-free days.
- Last spring frost
- February 25
- First fall frost
- November 25
- Growing season
- 274 days
- Hardiness zone
- 10a
50% probability
50% probability
frost-free
30 to 35°F annual low
Planting calendar for 94062
| When | What to do |
|---|---|
| December 17 – December 31 | Start peppers and aubergines indoors They need eight to ten weeks under lights before they can go out. |
| December 31 – January 14 | Start tomatoes indoors Six to eight weeks gives a transplant big enough to set fruit early. |
| January 28 – February 11 | Sow peas, spinach, lettuce, radish outdoors These tolerate light frost and prefer to germinate in cool soil. |
| February 25 onward | Transplant tomatoes, peppers, basil, squash, cucumbers The average last freeze has passed — still watch the actual forecast. |
| by September 2 | Sow the autumn crop of carrots, beets and brassicas They need about twelve weeks to size up before growth stops. |
| by November 11 | Harvest tender crops, or be ready to cover them A first freeze two weeks early is well within normal variation. |
| November 25 onward | Plant garlic, mulch beds, lift tender bulbs Garlic wants a cold spell; bare soil loses structure over winter. |
What these dates mean
Wait until after February 25 to put tender plants — tomatoes, peppers, basil, squash — in the ground. That is the date by which half of years in Redwood City, California are past their last freeze. Harvest before November 25, which leaves roughly 274 frost-free days.
ZIP 94062 sits in USDA hardiness zone 10a, meaning the average coldest night of the year falls between 30 to 35°F. Zone decides what survives the winter; frost dates decide when to plant each spring. They are different questions, and a plant can pass one and fail the other.
These are thirty-year NOAA averages for 1991–2020, not a forecast. Any individual year can frost two to three weeks either side of these dates, so check the actual forecast before planting out.