How to Grow Buttercup Squash (Burgess Strain)
Cucurbita maxima 'Buttercup'
Buttercup Squash is a popular warm-season variety prized for its excellent storage capability and resistance to common squash diseases. Gardeners grow this large-fruited cultivar for its sweet flesh and ability to thrive in full sun across diverse USDA zones.
📷 Wikimedia CommonsStarting Buttercup Squash (Burgess Strain): indoors or direct sow?
🌾 Sow directly in the garden — Buttercup Squash (Burgess Strain) is not usually started indoors.
Do not start indoors; sow seeds directly into the garden only after all danger of frost has passed and soil temperatures are warm enough for germination.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 6.0 and 6.8 before planting. Since this is a warm-season crop sensitive to frost, sow seeds directly outdoors only after the last spring frost when the ground has warmed up. Press seeds into the soil at a depth of about one inch, where they typically germinate within eight to twelve days.
Space plants six to eight feet apart to accommodate their large vines and ensure good airflow. Water consistently with one inch per week, reducing frequency as fruits mature. Apply mulch around the base to retain moisture and suppress weeds, while feeding regularly to support heavy fruit production throughout the season.
Watch for squash bugs, cucumber beetles, and vine borers; use row covers early or inspect leaves daily. Prevent powdery mildew and downy mildew by ensuring good air circulation and avoiding overhead watering. Harvest fruits one hundred to one hundred twenty days after sowing when they are fully colored and firm.
When to Plant Buttercup Squash (Burgess Strain)
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | — | July – August | November – August |
| Zone 2 | — | June – August | November – September |
| Zone 3 | — | June – July | October |
| Zone 4 | — | June – July | October |
| Zone 5 | — | May – June | October |
| Zone 6 | — | May – June | September – November |
| Zone 7 | — | April – June | September – October |
| Zone 8 | — | April – May | August – October |
| Zone 9 | — | March – April | July – September |
| Zone 10 | — | February – April | July – August |
| Zone 11 | — | January – March | June – July |
| Zone 12 | — | January – March | June – July |
| Zone 13 | — | January – March | June – July |
Companion Plants for Buttercup Squash (Burgess Strain)
✓ Good companions
Fixes nitrogen in soil for heavy-feeding squash, completes Three Sisters companion trio
Repels squash bugs, cucumber beetles, and other common cucurbit pests
Provides natural shade and wind protection, part of traditional Three Sisters planting
Attracts beneficial insects like predatory wasps that control squash pests
Repels cucumber beetles, squash bugs, and nematodes with their strong scent
Acts as trap crop for squash bugs and cucumber beetles, repels aphids
Deters squash vine borers and cucumber beetles, breaks up soil for squash roots
Attracts pollinators essential for squash fruit production, provides beneficial shade
✗ Keep away from
Plants like sage and rosemary can stunt squash growth through chemical interference
Releases allelopathic compounds that inhibit growth of squash and most vegetables
Compete for space and nutrients, both are heavy feeders that deplete soil
Nutrition Facts
Per 100g serving (USDA FoodData Central)
