[header] How to grow spaghetti squash [title] Aim for a warm planting season. [step] Spaghetti squash need a long growing season and warm temperatures, and that includes warmth at planting time. So any seeds would have to go out after your frost date has passed. 
But starting your seedlings indoors is a common way for gardeners to start their squash plants. [title] Plant your seeds inside about a month before your local last frost date.