Mississippi · zones 8a–9a
When to plant potatoes in Mississippi.
Sow between Feb 3 to Mar 8 in a typical year, keyed to Mississippi's median last frost around Mar 13. A second, fall sowing fits Jul 22 to Aug 4. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Potatoes dates for a typical Mississippi season.
Direct sow
Feb 3 to Mar 8
Keyed to the ~Mar 13 last frost. Sow 4" deep, 12" apart.
Fall round
Jul 22 to Aug 4
Counted back from the ~Nov 9 first frost.
Harvest
~90 days later
~3 lb per plant over ~1 weeks.
Mississippi spans more than one climate: Zone 8 is the most common zone, but the state runs 8a to 9a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
In Mississippi: watch for
The pests that find potatoes here.
With about 241 frost-free days, potato spends longer in the ground here than in most of the country, which widens the window in which colorado potato beetle can find it. Scout weekly from midseason and act on the first signs.
Striped beetles and orange grubs eating the leaves.
Organic fix: Handpick adults, crush the orange egg clusters, dust with diatomaceous earth.
Dark greasy blotches after cool, wet spells.
Organic fix: Pull infected plants fast, keep leaves dry, use neem as a preventive.
Common scab
Rough, corky patches on the skin, raised on some tubers and sunk into pits on others.
Organic fix: Keep the bed evenly moist through the weeks right after tubers set, rotate away from potatoes, and pick a scab-resistant variety next time.
Your season math: Mississippi gives potatoes about 241 frost-free days, and it needs roughly 90 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting potatoes in Mississippi: questions
When should I plant potatoes in Mississippi?+
In a typical Mississippi year, sow potatoes between Feb 3 to Mar 8, keyed to the state's median last frost around Mar 13. There's also a fall window: Jul 22 to Aug 4. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Mississippi?+
Mississippi spans zones 8a–9a, mostly zone 8. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many potatoes plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.