
Delicata Squash
Cucurbita pepo
Family: Cucurbitaceae
Delicata squash, also called sweet potato squash, has thin edible skin and creamy, sweet flesh. Its oblong shape with green stripes makes it easy to identify. One of the easiest winter squash to prepare since no peeling is required.
Days to Harvest
95-105 days
Sun Needs
Full Sun (6-8+ hours)
moderate
Germination Temp
85°F optimal
Start Indoors
3 weeks before last frost
Germination
5-10 days
Seed Depth
1 inch
Light to Germinate
No
đź’ˇ Tip: Direct sow preferred.
Soil Type
Rich, well-draining soil
pH Range
6 - 6.8
Spacing
4-6 feet between plants
⚠️ Avoid planting near:
History
Delicata squash exemplifies how a heirloom variety can be rediscovered and elevated from obscurity to culinary stardom. First introduced to American seed catalogs by Peter Henderson & Co. in 1894, delicata (from the Latin for "delicate") was prized for its exceptionally tender, edible skin and sweet, potato-like flesh. For decades it was a popular home garden variety, but the mid-20th century shift toward commercial agriculture nearly drove it to extinction—delicata's thin skin, which makes it so appealing to eat, also makes it prone to bruising and difficult to ship, with a storage life of only 2-3 months compared to the 6+ months of thicker-skinned varieties. By the 1970s, delicata had virtually disappeared from both commercial production and seed catalogs. The variety's resurrection began in the 1990s farm-to-table movement, when chefs and farmers' market vendors rediscovered its exceptional culinary qualities. Johnny's Selected Seeds in Maine played a crucial role in preserving and improving delicata genetics. Today, delicata is a farmers' market darling and a favorite of restaurant chefs who appreciate that the thin, striped skin eliminates the need for peeling—simply slice into rings or half-moons and roast. The "sweet potato squash" nickname perfectly captures its flavor profile: creamy, sweet, and slightly nutty, with a texture reminiscent of roasted sweet potato. Newer varieties like Bush Delicata offer compact vines suitable for small gardens, while Honey Boat and Sugar Loaf variations provide subtle flavor differences. Delicata's comeback story represents a broader trend of heirloom revival, proving that flavor and ease of preparation can triumph over industrial efficiency.
Nutritional Benefits
- ✓High in Vitamin A
- ✓Good source of Vitamin C
- ✓Contains potassium
Optimal Growing Temp
65°F - 85°F
Delicata thrives in warm temperatures between 65-85°F. Growth slows below 60°F and above 90°F. Full sun produces the sweetest, most flavorful flesh.
Survival Range
50°F - 95°F
Can survive these temperatures
Frost Note: Killed by any frost. Plant only after all frost danger has passed and soil has warmed to at least 60°F. Harvest before hard frost.
Best USDA Zones
Humidity
50-70%
Moderate humidity is ideal. Good air circulation prevents powdery mildew and other fungal diseases.
Height
12-18 inches
Spread
6-10 feet
Growth Habit
vine
Germination
5-10 days
Seed coat splits, cotyledons emerge and unfold, hypocotyl straightens. Faster in warm soil (85°F optimal).
Seedling Stage
Duration: 2-3 weeks
True leaves: First true leaves are rounded with scalloped edges, appearing after cotyledons
Transplant ready: Ready to transplant when 2-3 true leaves developed and roots fill cell. Handle carefully.
Vegetative Growth
Duration: 4-6 weeks
Vines extend with large lobed leaves. Root system establishes in rich soil.
Flowering
Timing: 6-8 weeks after planting
Duration: 4-6 weeks
Requires bee pollination. Male flowers appear first, female flowers have small oblong striped fruit at base.
Fruit Development
Begins: 1-2 weeks after successful pollination
Duration: 6-8 weeks to maturity
Fruit elongates with distinctive cream and green striped pattern. Skin remains thin and tender.
Harvest Maturity
Timing: 100-110 days from seed
- Cream background deepens to golden
- Green stripes remain distinct
- Skin thin but firm
- Dry, corky stem
- Sweet potato-like aroma when cut
Per Plant
6-10 squash (1-2 lbs each)
Per Square Foot
1-2 lbs averaged over growing area
Harvest Frequency
Single harvest when all fruit matures in fall
Factors Affecting Yield
- •Pollination success
- •Consistent watering
- •Soil fertility
- •Growing season length
- •Disease management
Seedling Stage
Keep consistently moist, water daily if needed
Established Plants
1-2 inches per week through deep watering
During Fruiting
Maintain consistent moisture; reduce slightly as fruit matures
Preferred Method
Drip irrigation or soaker hose at soil level. Avoid overhead watering.
⚠️ Critical Watering Periods
- • Flowering and fruit set
- • Fruit development
Pro Tips
- Water at base of plant to avoid wet foliage
- Morning watering allows leaves to dry before evening
- Mulch heavily to retain moisture
- Inconsistent watering affects flavor development
- Reduce watering 1-2 weeks before harvest to concentrate sugars
Feeding Schedule
Pre-planting
Compost and balanced organic fertilizer
Once at soil preparation
Vine development
Balanced fertilizer (10-10-10)
Every 2-3 weeks
Flowering/Fruiting
Low-nitrogen, high-phosphorus fertilizer
Every 2-3 weeks
Organic Options
Side-dress with compost when vines begin to run. Apply fish emulsion every 2-3 weeks during fruiting. Potassium improves flavor.
Minimum Size
15 gallon minimum
Recommended Size
20+ gallons for best results
Depth Required
At least 12 inches deep
Best Varieties for Containers
Container Tips
- Choose bush varieties for containers when available
- Allow vines to trail over edges or up trellis
- Water more frequently than in-ground plants
- Delicata is productive in containers—expect 4-6 fruits
- Light fruit weight (1-2 lbs) makes trellising easy
Support Type
A-frame or vertical trellis
Height Needed
6-8 feet
When to Install
Install at planting time before vines develop
Method
Train main vine up trellis with soft ties. Delicata is light enough that fruit slings may not be needed.
Tips
- Saves significant garden space
- Improves air circulation and reduces disease
- Makes pest inspection easier
- Produces cleaner, more uniformly striped fruit
- Space-saving vertical growing works excellently
Why Prune
When
After fruit set, when multiple squash are developing
How Often
Once or twice during growing season
Technique
Pinch off vine tips to redirect energy to developing fruit. Remove damaged or diseased leaves.
Remove
- âś— Excess developing fruit beyond 6-8 per vine
- âś— Vine tips after adequate fruit set
- âś— Damaged or diseased leaves
- âś— Secondary vines if space limited
Keep
- âś“ Main vine and primary branches
- âś“ Selected fruits (6-8 per vine)
- âś“ Healthy foliage for photosynthesis



