Black Beauty Zucchini
Cucurbita pepo 'Black Beauty'
Black Beauty Zucchini is a classic heirloom squash variety prized for its deep, glossy dark green skin and tender, flavorful flesh. Reaching maturity in 90-100 days, this variety produces elongated fruits that are best harvested when young and tender, typically 6-8 inches long. The defining characteristic of Black Beauty is its mild, slightly sweet flavor with a delicate texture that makes it ideal for cooking, grilling, or eating raw in salads. This productive plant thrives in full sun and rich, well-drained soil, making it an excellent choice for home gardeners seeking reliable, quality harvests.
Harvest
90-100d
Days to harvest
Sun
Full sun
Zones
4–11
USDA hardiness
Height
2-3 feet
Planting Timeline
Showing dates for Black Beauty Zucchini in USDA Zone 7
All Zone 7 squash →Zone Map
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Black Beauty Zucchini · Zones 4–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 1 | — | — | July – August | November – August |
| Zone 2 | — | — | June – August | October – September |
| Zone 11 | — | — | January – March | May – July |
| Zone 12 | — | — | January – March | May – July |
| Zone 13 | — | — | January – March | May – July |
| Zone 3 | — | — | June – July | August – October |
| Zone 4 | — | — | June – July | August – October |
| Zone 5 | — | — | May – June | August – September |
| Zone 6 | — | — | May – June | July – September |
| Zone 7 | — | — | April – June | July – August |
| Zone 8 | — | — | April – May | June – August |
| Zone 9 | — | — | March – April | May – July |
| Zone 10 | — | — | February – April | May – June |
Succession Planting
Direct sow every 3-4 weeks from late April through late June in zone 7. Each planting will stay productive for roughly 4-6 weeks before heat stress, powdery mildew (Podosphaera xanthii), or vine borer pressure starts dragging it down — staggering keeps you in fruit without a glut. Stop sowing by early July. NC State Extension notes that squash vine borers begin laying eggs in July, so seed put in the ground after that point is likely feeding larvae before it feeds you.
Zucchini slows down hard once daytime highs are consistently above 90°F. If your summer runs hot, a late planting around August 1-15 — started from transplants to compress the timeline — can catch the cooler stretch in September and October and often outperforms the heat-stressed midsummer plants.
Complete Growing Guide
Light: Full sun (6 or more hours of direct sunlight a day). Soil: High Organic Matter, Loam (Silt), Sand. Soil pH: Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage. Height: 2 ft. 0 in. - 3 ft. 0 in.. Spread: 0 ft. 9 in. - 1 ft. 0 in.. Spacing: Less than 12 inches. Growth rate: Medium. Maintenance: Low. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Harvest Black Beauty Zucchini when fruits are 6-8 inches long and the skin is still tender—this is when flavor and texture are optimal. Check plants every 2-3 days during peak season, as zucchini grows rapidly. Pick in early morning when the plant is hydrated and cooler, making handling easier and reducing plant stress. Visual cues for readiness include a dark, glossy appearance and slight firmness when gently squeezed. Test maturity by pressing a fingernail into the skin—it should easily puncture when ripe. Use a sharp knife or pruning shears to cut the fruit at the stem base, leaving a short stem attached. Avoid pulling or twisting, which damages vines and reduces future productivity. Never allow fruit to become oversized, as larger zucchini develop tough skin, larger seeds, and diminished flavor. Regular harvesting encourages continued production throughout the season.
Storage & Preservation
Fresh Black Beauty zucchini stores best unwashed in the refrigerator crisper drawer for 4-7 days. Wrap individual fruits in paper towels to absorb excess moisture and prevent the soft rot that quickly spreads between stored squash. Avoid storing with ethylene-producing fruits like apples or tomatoes.
For freezing, slice or shred zucchini and blanch for 1-2 minutes, then drain thoroughly and freeze in measured portions. Grated Black Beauty freezes exceptionally well for baking—simply thaw and drain before adding to zucchini bread or muffin recipes. You can also freeze spiralized 'noodles' on baking sheets before transferring to freezer bags.
Dehydrating works well for chips or long-term storage—slice thinly and dry at 125°F until crisp. Pickled zucchini spears showcase Black Beauty's firm texture beautifully and last months in the refrigerator using standard cucumber pickle recipes.
History & Origin
Origin: Southern Europe, Western Asia and Northern Africa
Advantages
- +Attracts: Butterflies, Hummingbirds
- +Low maintenance
Companion Plants
Nasturtiums and marigolds are worth planting along the perimeter of your zucchini patch for practical reasons. Nasturtiums act as a trap crop for aphids — the bugs prefer them over the squash, so you end up with infested nasturtiums you can pull and discard rather than infested zucchini you care about. Marigolds (Tagetes patula specifically) produce root exudates that suppress certain soil nematodes, and their scent is thought to break up cucumber beetle flight patterns. Neither one eliminates the problem, but both are low-cost and do something useful beyond just sitting there.
Beans and corn make good neighbors for structural and fertility reasons. Beans fix nitrogen at the root level, which zucchini — a heavy feeder — can draw on across the season. Corn provides some vertical windbreak and, in a loose Three Sisters layout, the squash sprawl fills in ground cover that crowds out weeds. Radishes are worth tucking in early: they're reputed to deter squash bugs and cucumber beetles, and at 25-30 days to maturity they'll be out of the ground before the zucchini canopy closes over them anyway.
Keep potatoes and pumpkins at a distance. Potatoes share several fungal and viral diseases with cucurbits and can serve as a reservoir for squash mosaic virus moving through the garden. Pumpkins are the more immediate problem — they're also Cucurbita pepo, so close proximity invites cross-pollination if you're saving seed, and both crops pull hard on the same soil nutrients without offering anything to each other in return. Strong aromatic herbs like rosemary or sage won't kill your zucchini, but they want sharply drained, drier soil — conditions that actively work against a crop that needs 1-2 inches of water per week at the root zone.
Plant Together
Nasturtiums
Repels squash bugs, cucumber beetles, and aphids while attracting beneficial predatory insects
Marigolds
Deters squash bugs, aphids, and nematodes with their strong scent and root compounds
Radishes
Repels squash vine borers and cucumber beetles, harvest before zucchini spreads
Beans
Fix nitrogen in soil for heavy-feeding zucchini, can climb zucchini's sturdy stems
Corn
Provides vertical structure and partial shade, part of traditional Three Sisters planting
Catnip
Strongly repels squash bugs, cucumber beetles, and aphids
Dill
Attracts beneficial insects like parasitic wasps that control squash pests
Lettuce
Benefits from zucchini's shade, efficient use of garden space as ground cover
Keep Apart
Potatoes
Both are heavy feeders competing for nutrients, potatoes may stunt squash growth
Pumpkins
Cross-pollination can affect fruit quality, compete for space and nutrients
Aromatic herbs (strong)
Sage, rosemary, and other strong herbs may inhibit zucchini growth and development
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #168565)
Pests & Disease Resistance
Resistance
Moderate resistance to common squash diseases
Common Pests
Squash bugs, cucumber beetles, squash vine borers, aphids
Diseases
Powdery mildew, downy mildew, bacterial wilt, squash mosaic virus
Troubleshooting Black Beauty Zucchini
What you'll see, why it happens, and what to do about it.
Wilting plant that doesn't recover overnight, even with adequate water — sometimes with yellowing and a slimy stem base
Likely Causes
- Bacterial wilt — spread by cucumber beetles (Acalymma vittatum) feeding on leaves
- Squash vine borer (Melittia cucurbitae) — larvae tunneling inside the main stem
What to Do
- 1.Cut a wilted stem near the base and touch the cut ends together; if stringy, thread-like ooze bridges the gap when you pull them apart, bacterial wilt is confirmed — pull the plant, it won't recover
- 2.For vine borer, slit the stem lengthwise where you see frass (sawdust-like castings), extract the larvae, and mound soil over the wound to encourage re-rooting
- 3.Next season, plant squash as early as the soil allows — NC State Extension notes that squash planted early can mature before vine borers begin laying eggs in July
White powdery coating on upper leaf surfaces, usually showing up mid-summer on older leaves first
Likely Causes
- Powdery mildew (Podosphaera xanthii) — a fungal pathogen that thrives in warm days with cool nights, especially in crowded plantings with poor airflow
What to Do
- 1.Remove the worst-affected leaves and bin them — don't compost
- 2.Spray remaining foliage with a diluted baking soda solution (1 tablespoon per gallon of water) or a potassium bicarbonate product; repeat every 7-10 days
- 3.Space plants at least 36-48 inches apart at planting time to keep air moving through the canopy
Stunted, puckered new growth with mosaic-patterned yellowing on leaves — fruit may come out mottled or warty
Likely Causes
- Squash mosaic virus (SqMV) — transmitted by aphids and cucumber beetles feeding on infected plants nearby
- Aphid colonies on new growth, which carry the virus plant-to-plant as they move
What to Do
- 1.Pull and trash any plant showing mosaic symptoms immediately — there's no cure, and leaving it in the ground gives the virus more time to spread
- 2.Knock back aphid populations with a hard spray of water or insecticidal soap; focus on the undersides of leaves where colonies cluster
- 3.Rotate out of the cucurbit family for at least 3 years in that bed, per NC State Extension guidance, to reduce overwintering pest and disease pressure
Frequently Asked Questions
How long does Black Beauty zucchini take to grow from seed?▼
Can you grow Black Beauty zucchini in containers?▼
Is Black Beauty zucchini good for beginners?▼
What does Black Beauty zucchini taste like?▼
When should I plant Black Beauty zucchini seeds?▼
Black Beauty vs Eight Ball zucchini—what's the difference?▼
Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.