What to plant this week in Sioux Falls, SD
Sioux Falls gardeners are currently in a deep winter wait as snow covers the soil and temperatures hover near -20°F, well below any planting threshold. With the last frost not expected until May 8th, all outdoor gardening activities must pause to protect your plots from freezing damage.
The next 7 days
Sioux Falls, SDGrowing in Sioux Falls right now
- Wait for spring thaw before attempting to till heavy clay soils common in the Fargo-Sioux Falls corridor, as frozen ground compacts easily and resists penetration.
- Avoid covering bare soil with plastic tarps now, as extreme cold snaps can trap moisture and increase the risk of root rot once temperatures fluctuate rapidly near freeze-thaw cycles.
- Focus your energy on indoor seed starting planning for next spring; do not attempt to sow or transplant anything outdoors right now regardless of hardiness ratings.
- Check drainage in low-lying areas of the city, as winter ice accumulation can exacerbate soil saturation issues when meltwater arrives quickly.
Sow this week
No direct sowing windows open this week.
Transplant this week
Nothing is due to go out this week.
Harvest soon
No harvest windows opening just yet.
Seasonal tips
- Finish clearing debris from last year's garden to reduce winter pests and diseases.
- Apply a thick layer of mulch over perennial beds once the ground has frozen solid to prevent heaving.
- Plan your spring succession schedule by calculating days-to-maturity for crops you want in early summer.
Pest & disease watch
- Monitor for winter moth larvae under snowpack; they may hatch early if a warm spell occurs before the final deep freeze sets in.
- Check evergreens like spruce and fir for spider mite activity, which can thrive in sheltered microclimates even during colder months.
- Inspect ornamental shrubs for sign of deer browsing on tender new growth that might emerge unexpectedly during rare mild winter days.
Watering this week
Avoid watering the garden until the ground thaws to prevent ice formation that could damage root systems.
Now is an excellent time to sharpen your tools and organize your seed inventory so you are ready to plant immediately when the frost date passes.
Sioux Falls gardening questions
3Can I plant my spring bulbs now if I want them to bloom early?
No, do not plant bulbs in Sioux Falls right now because the ground is frozen solid and temperatures are too low for root establishment. Wait until after the last frost on May 8th when soil moisture is sufficient for planting.
Should I mulch my vegetable garden beds this week?
It is not necessary to mulch frozen vegetable beds at this time, as the ground is inactive and rain/snow will provide enough coverage. Apply organic mulch like straw or shredded leaves only after the last frost when plants are actively growing.
When should I start planning my summer crop schedule?
Start mapping out your planting calendar now, but remember that most warm-season vegetables in zone 5a need to be transplanted after May 8th. Use this winter time to research varieties suited for the short growing season typical of Sioux Falls.
Other cities in zone 5a
6See the full zone 5a guide → · Plan your Sioux Falls garden in SproutGuide →