Why are my squash flowers falling off?

The plant produces separate male and female flowers, and the male flowers often drop off after shedding pollen.

Can I grow these in a container?

Yes, but you need a very large container, at least 20 gallons, to accommodate the extensive root system.

Plant guide

Courgette.

Cucurbita pepo

Pronounced koo-KUR-bi-tuh PEE-poh

Also known as Acorn squash, American Pumpkin and Summer Squashes, American pumpkin, Summer squash, Brazilian Pumpkin, Bush squash, Courgette, Kamokamo

Courgettes are fast growing summer squash that produce a bounty of tender fruits. They love a sunny spot in the garden and plenty of rich soil to thrive. You will enjoy picking them while they are still small and firm for the best flavor.

At a glance

Care level: Easy
Plant type: Annual vegetable
Light: Full sun
Indoor light: Direct sun
Water: Every 1 to 3 days
Mature size: 3 to 4 feet wide
Growth rate: Fast
Hardiness: USDA 3 to 11
Bloom time: Mid summer to early autumn

Care

Keep the soil consistently moist and mulch around the base to retain water. Watch for powdery mildew on the leaves, which often appears as a white dusty coating. Harvest fruits regularly to encourage the plant to keep producing more.

Watering: Water deeply at the base of the plant to keep the soil moist but not soggy.
Feeding: Apply a balanced liquid fertilizer once the plant begins to flower.
Pruning: Remove older or damaged leaves to improve airflow and prevent fungal issues.
Repotting: Courgettes are typically grown directly in the ground or large containers and do not require repotting.
Soil: Rich, well draining, organic soil
Soil pH: 6.0 to 7.5
Temperature: 15 to 35°C
Humidity: 40 to 70%
Drought tolerance: Low
Lifespan: Annual
Fragrance: Light
Deer and rabbits: Low

Signs it needs repotting

Roots growing out of the drainage holes
Stunted growth despite regular feeding
Soil drying out much faster than usual

Safety

People: The plant is generally non-toxic, though bitter-tasting fruits containing high levels of cucurbitacins can cause digestive distress.
Children: The large, prickly leaves and stems can scratch delicate skin, so supervise children when they are playing near the vines.
Contact allergens: The stiff, prickly hairs on the stems and leaves can cause mechanical skin irritation.
Airborne allergens: Pollen from the large, open flowers may trigger mild reactions in sensitive individuals.
Edibility: Always wash the rind thoroughly before preparation and avoid eating if the fruit tastes bitter, as this can indicate high cucurbitacin levels.

How to identify it

Large, prickly, lobed green leaves
Bright yellow, trumpet shaped flowers
Cylindrical, smooth or slightly ribbed fruits
Sturdy, bushy or trailing growth habit

Height: 0.3 to 0.6m
Spread: 1 to 3m
Leaves: green, deciduous
Flowers: yellow, 5 to 12cm
Fruit: green, yellow, orange, white, Late summer to autumn

Problems to watch for

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: Spring, Early summer
Overwintering: This plant is an annual and will die with the first frost, so remove and compost the vines once they wither.
In containers: It grows well in large containers of at least 20 gallons, provided you use a sturdy trellis for vining types.

Direct Sowing

Wait until all danger of frost has passed and the soil is warm.
Plant seeds 2 centimeters deep in rich, well draining soil.
Space mounds at least 1 meter apart to allow for spreading vines.

Planting squash with corn and beans creates a classic Three Sisters garden where each plant supports the others.

Grows well with

Corn · Corn provides a natural trellis for vining varieties to climb.
Beans · Beans fix nitrogen in the soil which helps the squash grow.
Nasturtium · These flowers help deter common garden pests.

Keep away from

Potato · They compete for similar soil nutrients and space.

Similar species

Butternut squash · It is a related species with similar growth habits but different fruit characteristics.

Science

Family: Cucurbitaceae
Genus: Cucurbita
Order: Cucurbitales
Class: Magnoliopsida
Native range: Central and North America
Conservation: Not of conservation concern as it is a widely cultivated agricultural crop.

It thrives in sunny, open areas with rich soil and relies on bees for pollination to produce fruit.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: culinary vegetable, ornamental display, autumn decor

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 6/9
Light: 8/9
Temperature: 7/9
Moisture: 6/9
Nutrients: 8/9

Taxonomy resolved against GBIF.

Questions people ask

Why are my squash flowers falling off?: The plant produces separate male and female flowers, and the male flowers often drop off after shedding pollen.
Can I grow these in a container?: Yes, but you need a very large container, at least 20 gallons, to accommodate the extensive root system.

Where the name comes from

The genus name Cucurbita is the Latin word for gourd, while the specific epithet pepo refers to the large, fleshy fruit.

Good to know

Pumpkins are technically a type of berry.
The flowers are edible and often used in culinary dishes.
Native Americans grew these alongside corn and beans as part of the Three Sisters planting method.
The fruit can grow quite rapidly, sometimes adding several pounds in a single day.

Keep your courgette growing

This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.