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Why Butternut Squash Grow Round from Saved Hybrid Seeds

Round butternuts from saved seeds mean the parent was a hybrid, not heirloom. Hybrids don’t breed true—offspring express mixed grandparent traits. Heirlooms replicate exactly.

For consistent shape, buy fresh hybrid seed from breeders (Park, Burpee) or grow heirlooms like 'Waltham' for true-to-type harvests. Saved hybrid seed is a genetic lottery.

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