Spinach · Tacoma, Washington, United States
When to plant spinach in Tacoma
Main outdoor window
30 Jan - 13 Feb
The window this page is built around.
Timed from last spring frost
13 March
In Tacoma, on your chosen risk.
Ready to pick
11-21 Mar
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Tacoma
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Sow for overwintering
27 Aug - 17 Sep
Counting back 64 days from your first frost so the crop matures in time.
Sow direct
30 Jan - 13 Feb
Six weeks before your last frost.
Harvest
11-21 Mar
Spinach through the year
Against the frost risk in Tacoma
Why these dates
Spring sowings must go in early - six weeks before last frost - to crop before bolting. The autumn sowing, six to eight weeks before first frost, is usually far more productive.
Overwinters under snow in zone 5 and regrows in spring. One of the few crops that genuinely prefers frost.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Spinach are timed for direct sowing 6 weeks before it, and this page simply resolves those offsets against the frost date computed for Tacoma.
The median frost-free season here is 252 days, against 40 to 50 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.
Also in Tacoma
Other vegetables to time
Growing spinach in Tacoma
When should I plant spinach in Tacoma?
Aim for 30 Jan - 13 Feb in an average year. If you would rather not gamble on the weather, wait until 28 Feb - 14 Mar - by then frost has finished in nine years out of ten.
When will spinach be ready to harvest in Tacoma?
Expect to start picking around 11-21 Mar, based on 40 to 50 days to maturity from the planting date calculated for this location.
How much frost will spinach tolerate?
Overwinters under snow in zone 5 and regrows in spring. One of the few crops that genuinely prefers frost.