Zucchini 'Black Beauty'

Sun

Full sun; at least 6-8 hours of direct sunlight daily.

Water

Keep soil evenly moist, especially during flowering and fruiting. Water deeply at soil level whenever the surface begins to dry; containers may need daily watering in hot weather.

Soil

Fertile, moisture-retentive but well-drained soil enriched with compost; slightly acidic to neutral soil is ideal.

Height

2-3 ft (0.6-0.9 m)

Spread

3-4 ft (0.9-1.2 m)

Flowers

Large yellow flowers from early summer until autumn; separate male and female flowers grow on the same plant.

Foliage

Large, rough, lobed green leaves on thick, prickly stalks, forming a broad, open bush.

Growth

Fast; first picking is often about 50-60 days after sowing in warm conditions.

Care needed

Medium

• Pollinators
• Low allergen
• Edible

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.5 ft (0.15 m)

2. After 1 year

   2.5 ft (0.75 m)

   full size

Full size in one season.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Native to

the US

Growth rate

Fast

• Plant out after the last frost once soil has warmed to at least 16°C (61°F); allow about 3-4 ft (0.9-1.2 m) between plants.
• Work compost into the bed before planting, then feed with a balanced vegetable fertiliser according to its label.
• Water the soil deeply and consistently rather than repeatedly wetting the leaves.
• Mulch once the soil is warm, keeping mulch clear of the main stem.
• For container growing, use one plant per pot holding at least 40 litres (about 10 US gallons), with good drainage.

Pruning. No routine pruning is needed. During the growing season, cut off dead or badly diseased leaves with clean secateurs, leaving healthy foliage and the growing point intact.

Pick fruits when about 6-8 in (15-20 cm) long, while the skin is glossy and tender and the seeds are small. Check plants every day or two during peak cropping, and cut the stalk with a knife or secateurs rather than twisting the fruit off. Male flowers are also edible; leave enough for pollination.

Early spring

Prepare a sunny bed with compost and plan enough room for the mature plants.

Mid-spring

In cooler climates, sow individual seeds indoors about 3-4 weeks before the expected last frost.

Late spring

Harden off indoor-raised plants and plant out after frost, or sow directly into warm soil.

Early summer

Mulch warm soil, water consistently and check developing flowers for successful fruit set.

Summer

Harvest frequently, feed as needed and inspect leaves for mildew and pests.

Autumn

Remove plants when cropping finishes or frost kills them; do not leave diseased crop debris in the bed.

• Use as a broad-leaved focal plant in a sunny kitchen garden.
• Plant in a spacious raised bed, keeping its leaves clear of narrow paths.
• Grow a single plant in a large patio container where watering and harvesting are easy.
• Combine with calendula or nasturtiums around the bed edges for flowers alongside the edible crop.

Garden styles it suits: Potager (kitchen garden), Edible landscape, Homestead, Cottage garden, Family-friendly and Farmhouse.

Plant it with: Calendula, Nasturtium, Borage, Lettuce and Bush beans.

Wildlife: Flowers provide pollen and nectar for bees, including squash bees where these occur in North America. Bee visits are important for reliable fruit set; avoid spraying insecticides on open flowers.

• Powdery mildew: white powdery patches develop on leaves, often late in the season. Allow good airflow, avoid drought stress and remove badly affected leaves; choose a locally approved treatment if needed.
• Poor fruit set: small fruits yellow and shrivel when pollination fails. Encourage bee visits and hand-pollinate a newly opened female flower with pollen from a male flower in the morning.
• Slugs and snails: young plants can be eaten overnight. Protect transplants, remove hiding places and use locally approved iron-phosphate bait if necessary.
• Squash vine borer: in parts of North America, larvae tunnel into stems and cause sudden wilting. Check stem bases for entry holes and sawdust-like waste; remove infested plants and crop debris, and protect young plants with insect mesh until flowering.

Normal, non-bitter zucchini fruits and flowers are not known to be toxic to people, cats, dogs or horses. Unusually bitter fruits can contain poisonous cucurbitacins and cause severe digestive illness; discard them immediately and do not feed them to animals. Leaf and stem hairs can irritate skin.

• Cucumber (Cucumis sativus)

  Cucumbers usually have more slender climbing or trailing stems, smaller flowers and fruits that may be bumpy or prickly. 'Black Beauty' has a stout bush habit, very large yellow flowers and smooth, dark fruits.

• Vegetable marrow (Cucurbita pepo)

  Young marrow fruits can be difficult to distinguish from zucchini. Marrow varieties are generally grown to a larger size;

Zucchini comes from the Italian word for small squashes, while courgette is the French diminutive of courge, meaning squash.

Propagation. Grow from seed, sowing about 1 in (2.5 cm) deep in warm compost or soil. 'Black Beauty' is open-pollinated, but saved seed may not come true if other compatible Cucurbita pepo varieties flower nearby; use fresh, reliably sourced seed when cultivar identity matters.

Accepted botanical name

Cucurbita pepo

In the US and Canada

Native in the lower 48 states. Introduced in the lower 48 states, Pacific Basin and Puerto Rico.

Native range

Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast and Mexico Southwest.

Measured

Average height 63 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.