Red Japanese · Sweet Potato
Planting Schedule
Add Red Japanese to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Direct Sow |
| Last Frost | Apr 20th |
| Transplant / Direct Sow Outdoors | Apr 20th |
| Harvest Begins | Jul 19th |
| Harvest Ends | Oct 20th |
Crop Details
Transplant Conditions:
Wait until soil reaches 70°F
and nights stay above 55°F
before moving outdoors.
Harden off for 10 days first.
Direct sow preferred — this crop has sensitive roots and does not transplant well.
If starting indoors, use biodegradable pots and disturb roots as little as possible when moving outdoors.
| Trait | Value |
|---|---|
| Days to Maturity | 90 |
| Sun Requirements | ☀️ Full Sun |
| Growth Habit | Vine |
| Support Needed | Trellis |
| Planting Depth | Normal |
| Germination Temp (°F) | 75 |
| Min Soil Temp (°F) | 70 |
| Min Night Temp (°F) | 55 |
| Harden Off (days) | 10 |
Expert Note: Plant slips/cuttings only after soil is fully warm (about 70°F+), because cold soil severely delays rooting and growth.