How to Grow Buttercup Maxima
Cucurbita maxima 'Buttercup'
Cucurbita maxima 'Buttercup' is a popular warm-season squash variety prized for its sweet, buttery flesh and reliable yield. Gardeners grow this hybrid for its excellent disease resistance and ability to produce large fruits in short growing windows.
📷 Wikimedia CommonsStarting Buttercup Maxima: indoors or direct sow?
🌾 Sow directly in the garden — Buttercup Maxima is not usually started indoors.
Direct sow seeds outdoors immediately after the last frost date once soil temperatures are warm enough for germination.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 6.0 and 7.0. As a warm-season crop, plant seeds directly outdoors only after the last spring frost when the ground is fully warm. Sow seeds 1 inch deep; they typically germinate within 7 to 14 days. Do not attempt indoor starting as this species thrives best in direct soil contact once conditions are right.
Space plants 48 to 72 inches apart to allow vines room to spread without overcrowding. Provide consistent moisture, aiming for one inch of water weekly, and reduce watering near harvest time. Apply a layer of mulch around the base to retain soil moisture and suppress weeds, but avoid piling it against the stems.
Watch for squash bugs, cucumber beetles, and vine borers; inspect leaves regularly and use row covers early in the season. Prevent powdery mildew, bacterial wilt, and black rot by ensuring good air circulation and avoiding overhead watering. Harvest fruits 95 to 105 days after sowing when they reach full size and color.
When to Plant Buttercup Maxima
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 | October – September |
| Zone 3 | — | June – July | October |
| Zone 4 | — | June – July | October |
| Zone 5 | — | May – June | September – October |
| Zone 6 | — | May – June | September – October |
| Zone 7 | — | April – June | August – October |
| Zone 8 | — | April – May | August – September |
| Zone 9 | — | March – April | July – August |
| Zone 10 | — | February – April | June – August |
| Zone 11 | — | January – March | May – July |
| Zone 12 | — | January – March | May – July |
| Zone 13 | — | January – March | May – July |
Companion Plants for Buttercup Maxima
✓ Good companions
Fixes nitrogen in soil for heavy-feeding squash, completes Three Sisters guild
Strongly repels squash bugs, cucumber beetles, and other squash pests
Provides natural trellis support and partial shade, part of Three Sisters planting
Repels squash bugs, cucumber beetles, and nematodes with natural compounds
Acts as trap crop for squash bugs and cucumber beetles, repels aphids
Repels cucumber beetles and provides ground cover to retain soil moisture
Deters squash vine borers and cucumber beetles, breaks up soil
Attracts beneficial insects and pollinators, provides wind protection
✗ Keep away from
Strong oils can inhibit squash growth and may affect fruit development
Inhibits growth through allelopathic compounds that stunt squash development
Compete for space and nutrients, both are heavy feeders with similar root zones
Nutrition Facts
Per 100g serving (USDA FoodData Central)
