Charleston Grey

Watermelon

Zone 5b Save Garden

Botanical illustration of Charleston Grey

🌱 95d to harvest Vine

Sink your teeth into Charleston Grey’s sun-warmed sweetness—its flesh is a vivid, blushing red with a crisp, juicy bite that feel…

Crop Dates

Milestone	Date
Start Indoors	May 18th
Last Frost	May 4th
Transplant / Sow Outdoors	Jun 1st
Harvest Begins	Sep 4th
Harvest Ends	Oct 5th

Crop Details

Trait	Value
Days to Maturity	95
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

Recommended Companions

African Marigold Marigold

Ladybird Nasturtium Nasturtium

Frequently Asked Questions

What’s the most common disease/pest issue for Citrullus lanatus (watermelon) and how do I control it?

In warm, humid weather, watermelon commonly develops powdery mildew (white dusting on leaves), which reduces fruit size if it spreads early. Start by spacing vines for airflow and removing heavily infected leaves; apply an approved sulfur-based fungicide early at the first sign and repeat according to the label. Watch also for aphids and manage them by spraying off early infestations with a strong jet of water and using insecticidal soap if needed.

How often should I water Charleston Grey watermelon during the main growing phase?

During the main vine growth and leading up to fruit set, keep the soil consistently moist but not waterlogged—about 1–2 inches (2.5–5 cm) of water per week depending on heat, with deeper watering 2–3 times rather than daily sprinkles. Once fruits begin enlarging, maintain even moisture to prevent uneven growth and splitting, and reduce slightly only if the soil stays wet or heavy rain is frequent.

How can I tell when Charleston Grey (Citrullus lanatus) is ready to harvest?

Harvest at about 95 days from sowing and confirm ripeness by looking for a yellow, creamy field spot where the fruit rests on the ground rather than a pale green one. The tendril closest to the fruit should turn brown and dry, and the fruit should sound hollow when tapped lightly. Avoid picking early—watermelons (Citrullus lanatus) won’t sweeten much after harvest.

Sink your teeth into Charleston Grey’s sun-warmed sweetness—its flesh is a vivid, blushing red with a crisp, juicy bite that feels cool and refreshing straight from the garden. The rind shows classic picnic-watermelon charm: bold, smoky green striping over a deep gray-green ground, built for satisfying heft and easy slicing. Grow Charleston Grey for backyard gatherings and for showy, slice-ready fruit that turns every warm day into a celebration of color and flavor.

Sowing Tips

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

Sensitive roots — does not transplant well. If starting indoors, use biodegradable pots and disturb roots as little as possible when moving outdoors.

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.