How Long Do Potatoes Take to Grow?

New potatoes in about 6–8 weeks; full-size storage crops usually need 90–120 days, depending on variety.

Potato timelines confuse beginners because “ready” means two different things: tender new potatoes versus tough-skinned storage potatoes.

Typical timelines

Goal	Rough timing	What to look for
New / early potatoes	About 6–8 weeks after planting	Plants flowering; tubers large enough to eat
Mature storage potatoes	About 90–120 days (variety-dependent)	Vines yellowing/dying back; skins set
After vine death (storage)	Often ~2 more weeks in ground	Thicker skins for curing and storage

Clemson notes potatoes average 100–120 days to maturity. Maryland lists about 90–120 days. Catalog “days to maturity” for your variety is the best single number.

What speeds things up or slows them down

Faster / earlier harvest

Early-maturing varieties
Warm (but not extreme) soil after planting
Pre-sprouting / chitting seed potatoes

Slower

Cold soil that delays emergence
Drought during tuber bulking
Excess nitrogen that pushes leafy growth and delays maturity
Late blight or other disease that kills tops early (tubers may be undersized)

Emergence itself may take 1–3+ weeks depending on soil temperature and seed condition. See How Long Do Potatoes Take to Sprout?.

How to use the calendar

Note your planting date
Mark +6–8 weeks for optional new-potato digging
Mark the variety’s maturity window for full harvest
For storage crops, plan curing time after harvest

Readiness signs → When Are Potatoes Ready to Harvest?
Digging method → How to Harvest Potatoes