SproutSmart
SproutSmart Intelligent Garden Sowing

Charleston Grey · Watermelon

Zone 5b Save Garden

Planting Schedule

Add Charleston Grey to your garden to build a schedule and get reminders.
MilestoneDate
Start IndoorsDirect Sow
Last FrostMay 4th
Transplant / Direct Sow OutdoorsMay 18th
Harvest BeginsAug 16th
Harvest EndsOct 5th

Crop Details

Transplant Conditions: Wait until soil reaches 65°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.
TraitValue
Days to Maturity90
Sun RequirementsFull Sun
Growth HabitVine
Support NeededTrellis
Planting DepthNormal
Germination Temp (°F)75
Min Soil Temp (°F)65
Min Night Temp (°F)55
Harden Off (days)10
Expert Note: For best sweetness and fewer issues, warm the soil fully and use black plastic or row cover early to keep soil and nights warm while the vines establish.