Red Marble · Onion
Planting Schedule
Add Red Marble to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Apr 7th |
| Last Frost | May 19th |
| Transplant / Direct Sow Outdoors | May 5th |
| Harvest Begins | Aug 3rd |
| Harvest Ends | Sep 21st |
Crop Details
Transplant Conditions:
Wait until soil reaches 45°F
and nights stay above 35°F
before moving outdoors.
Harden off for 7 days first.
| Trait | Value |
|---|---|
| Days to Maturity | 90 |
| Sun Requirements | ☀️ Full Sun |
| Growth Habit | Bulbing |
| Support Needed | None |
| Planting Depth | Normal |
| Germination Temp (°F) | 65 |
| Min Soil Temp (°F) | 45 |
| Min Night Temp (°F) | 35 |
| Harden Off (days) | 7 |
Expert Note: For cipollini-type onions, transplant when nights are consistently mild and keep the soil evenly moist so the bulbs form uniformly.