SproutSmart
SproutSmart Intelligent Garden Sowing

Japanese Murasaki · Sweet Potato

Zone 4b Save Garden

Planting Schedule

Add Japanese Murasaki to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDirect Sow
Last FrostMay 13th
Transplant / Direct Sow OutdoorsMay 13th
Harvest BeginsAug 11th
Harvest EndsSep 27th

Crop Details

Transplant Conditions: Wait until soil reaches 70°F and nights stay above 55°F before moving outdoors.
TraitValue
Days to Maturity90
Sun RequirementsFull Sun
Growth HabitVine
Support NeededNone
Planting DepthNormal
Germination Temp (°F)80
Min Soil Temp (°F)70
Min Night Temp (°F)55
Harden Off (days)Not Required
Expert Note: Sweet potatoes are grown for warm-weather roots—start with slips (or warm sprout starts) and wait to plant until soils are consistently warm and nights stay above their comfort zone.