Cool-season crops
Spinach planting calendar and growing plan
Spinach is a cool-season leaf crop whose useful sowing sequence can be interrupted by heat. Keep its own instructions separate from Swiss chard in combined growing guides.
Plan dates for Spinach
Editable exampleTransplant outside
Mar 20 – Apr 10, 2027 Suggested windowDirect sow
Apr 3 – 10, 2027 Suggested windowPaired transplant date (optional)
| Transplant outside | Start indoors |
|---|---|
| Mar 20, 2027 | Feb 6 – 20, 2027 |
| Apr 10, 2027 | Feb 27 – Mar 13, 2027 |
Sowing windows combine possible transplant dates. Choose a paired transplant date to narrow the nursery window. Wait for suitable soil and local conditions.
Direct sowing and transplanting are alternative ways to start a crop. Keep the tasks that match your method.
Sources and conditions
The selected seed-starting chart explicitly includes spinach. Chard instructions from another guide are not used.
- These are reviewed planning references. Check the variety, local soil and weather before acting; a frost date is not a forecast.
- This nursery reference comes from the seed-starting chart, not from Swiss chard instructions.
The calendar chart is the selected transplant model; the Utah guide gives a different near-last-frost reference.
- These are reviewed planning references. Check the variety, local soil and weather before acting; a frost date is not a forecast.
- This nursery reference comes from the seed-starting chart, not from Swiss chard instructions.
The detailed planting section gives direct seeding three to four weeks earlier than its near-last-frost transplant reference.
- These are reviewed planning references. Check the variety, local soil and weather before acting; a frost date is not a forecast.
- The detailed USU planting section supports earlier direct sowing; soil must be at least 40°F.
A planning reference, not a weather forecast.
Read the selected date source
The nursery schedule explicitly includes spinach. The direct-sowing window comes from the detailed Utah planting section, while a separate source supplies the final row spacing.
Plan a thinned stand
The spacing record describes individual spinach plants in rows. It is not a broadcast seeding density. Use germination and establishment assumptions separately when estimating seed needs.
Stop a sequence for real conditions
A weekly pattern can help organize sowing, but it should not continue automatically through unsuitable heat. The autumn reference also changes when protective covers are used.
Questions growers ask
Does the autumn cutoff mean the leaves will be ready by frost?
No. It is the source’s last-sowing reference under standard conditions, with a cover exception. It is not a maturity or harvest prediction.
Sources and conditions
These sources describe particular climates and growing methods. Use the conditions alongside the numbers.
Seed-Starting Date Calculator ↗
General nursery and setting-out reference, using a user-supplied spring frost-free date. Nursery duration is measured before setting out.
Succession Planting Charts for Vegetables ↗
General intervals under standard growing practices. Crop purpose and protected-cover exceptions matter; these are not harvest guarantees.
Growing spinach and Swiss chard in home gardens ↗
Only spinach-specific spacing and spring heat guidance are used; Swiss chard transplant instructions are excluded.
How to Grow Spinach in Your Garden ↗
Detailed section: direct-seeded spinach may be planted three to four weeks before the near-last-frost transplant reference.