85 days — 'Waltham Butternut' squash plants have a vining habit. Their fruit reach seven to nine inches long with a thick neck with a small seed cavity. The rinds mature to light tan color with flesh that is a wonderful, bright orange. 'Waltham Butternut' was an "All-America Selection®" in 1970. Each packet contains four grams, which is approximately 35 to 40 seeds.