Petch Siam

Family: Solanaceae Fruit Vegetable

Petch Siam brings a glossy, midnight-purple elegance to the garden—sleek, slender fruits that feel satiny to the touch and hold their shape with a tender bite.

Their flavor is pleasantly mild with a gentle, savory depth, making them ideal for stir-fries and quick sautés, as well as vibrant curries and dipping sauces. Grow Petch Siam for a steady harvest of Thai-style eggplants that look as striking as they taste, from first bloom to the final pick at about 75 days.

Light: Full SunMaturity: 75 DaysHabit: Indeterminate

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Feb 28th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Jun 20th
Harvest Begins	Sep 3rd
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Indeterminate
Support Needed	Stake
Planting Depth	Normal
Germination Temp (°F)	80
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Culinary Notes

Chef's Note

Petch Siam’s slender fruits cook fast and keep a tender, satiny bite, so they won’t melt into puree the way some larger eggplants can. Its mild, savory base is built for punchy Thai seasonings—high-heat stir-fry and late-add curries where the sauce clings instead of flooding.

Best Uses

quick Thai-style stir-fries where the pieces hold their shape
curry simmering—add late so they don’t collapse
hot dipping sauces (nam prik–style) where the flesh soaks up chili-salt
char-and-slice applications for smoky skin with creamy interior

Flavor Profile

mild, savory eggplantiness gentle, earthy depth tender, satiny bite that stays intact in heat absorbs sauces without turning spongy

Kitchen Pairings

chili paste lime fish sauce coconut milk cilantro soy sauce

Frequently Asked Questions

What pest or disease commonly hits Solanum melongena (eggplant) in home gardens, and how do I control it?

Eggplant commonly suffers from flea beetles that chew small holes in leaves, and from fungal leaf spots that appear as dark lesions in humid weather. Spray affected plants with neem oil (follow the label) for flea beetles, and remove heavily spotted leaves to improve airflow; if leaf spots spread, use a copper-based fungicide per label directions and avoid overhead watering.

How often should I water Solanum melongena during the 60–75 day fruiting phase?

Water deeply so the root zone stays evenly moist but not waterlogged—typically about 1–2 inches (2.5–5 cm) per week depending on heat and soil. Check moisture 2–3 inches down; if it’s dry at that depth, irrigate, and if the soil stays damp, hold off to prevent fruiting failure and disease.

How can I tell when petch siam eggplant (Solanum melongena) is ready to harvest?

Harvest when fruits are glossy and firm, with a fully developed size reached for your plants (around 75 days from transplant, typically). If you can easily dent the skin with a fingernail, it’s overripe—cut earlier and use sharp pruners, leaving a short stem on each fruit.