Pattypan squash

Growing in Pots, Balconies & Indoors

The pattypan is a compact, bushy summer squash – one of the better squashes for a pot – though it is a sun-loving vegetable, not a houseplant. The grower marks it as unsuitable indoors but confirms it grows well in containers. In full sun and a large, free-draining pot it crops steadily on a patio or sunny balcony, staying tidier than the sprawling vine types.

Quick Details

• Container Size: At least 10-20 L (2.5-5 gal); bigger gives a stronger, longer-cropping plant
• Indoor Suitability: Not a houseplant – it needs full sun, though its bushy 30-50 cm (12-20 in) habit suits a pot well
• Best Spot: Full sun, warm and sheltered
• Soil & Drainage: Well-ventilated, free-draining mix – potting mix or peat soil with perlite; it does not react well to overwatering
• Watering in Pots: Average – keep evenly moist but let it drain freely; avoid soggy soil

Indoors & On the Windowsill

• Not an indoor plant: The grower marks it as unsuitable indoors – even a compact squash needs strong sun and insects or hand-pollination to set fruit.
• Start outdoors: Sow or plant it straight into its outdoor container; it is a warm-season crop, not a houseplant.
• Overwintering: It is a frost-tender annual – it finishes in one warm season, so there is nothing to overwinter.

On a Balcony or Patio

• Light & heat: Give it the sunniest, warmest spot; its bushy habit needs less room than trailing squashes, making it a good balcony choice. Reflected wall heat dries the pot fast, so check moisture daily in summer.
• Pollination & picking: On a high balcony with few insects, hand-pollinate the flowers; pick the young fruits often to keep the plant productive.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A 10-20 L pot with plenty of holes for good drainage; the grower stresses it dislikes overwatering, so if you use a saucer it must dry out the same day. Terracotta breathes and dries faster, while glazed or plastic pots hold moisture longer.
• Potting mix: Choose a good container soil – well-ventilated potting mix or peat soil with perlite; soil choice matters for a heavy feeder in a pot.
• Feeding: A fruiting squash in a pot is hungry and leaches nutrients with watering, so feed regularly through the season, easing off high nitrogen once it flowers and fruits.
• Single season: As an annual crop there is no long-term re-potting – refresh with fresh mix for each new planting.

Bloom & Edible Flower Guide

Quick Details

• Bloom Season: Late spring into the warm summer months
• Flower Appearance: Large yellow flowers with five lobes; female flowers sit on a small round green pre-fruit, while male flowers are smaller and borne on a slender stalk
• Edibility: Edible — the golden blossoms are a prized vegetable, delicious stuffed or fried

Detailed Blooming Overview

Like other summer squash, pattypan carries separate male and female flowers on the same plant. The males usually open first and in greater numbers; each female flower shows a tiny round squash behind its petals, which swells into the fruit once the bloom is pollinated. Flowering picks up in late spring and continues while the weather stays warm.

Flower Characteristics

• Large, open yellow flowers with five lobes.
• Female flowers carry a small round green ovary (the future fruit); male flowers are smaller.

Bloom Care & Thinning

• Pollination: Bees and other pollinators move pollen from male to female flowers; in cool or bee-poor conditions, hand-pollination (touching a male flower’s pollen to the female’s center) ensures a good set.
• Blossom drop: Flowers or tiny fruits may shed after disease, water stress, or a lack of pollination — even watering and hand-pollination help.
• Harvesting blossoms: Male flowers can be picked for the kitchen while leaving females to fruit.

Bloom Health & Protection

• Powdery mildew: A common late-season fungus that coats leaves and stems near the flowers with white powder. Good spacing and airflow help; a sulfur- or potassium-bicarbonate-based fungicide is an option if it spreads.