Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to grow butternut squash [title] Plant once the soil has warmed. [step] Butternut squash seeds won't germinate in cold soil, so it's necessary to plant them once you're certain the last frost has passed. In warmer climates this could be in mid-spring, and in cooler climates you might have to wait until late spring.

Ending1: [substeps] If the soil feels gritty or too dry, the butternut squash seeds won't germinate. In that case, you may need to transplant the squash. Ending2: [substeps] Outdoor varieties of butternut squash may germinate in damp, sandy soil without a frost. You can find butternut squash seeds online and in specialty garden supplies stores. Ending3: If you plant your squash too early, it won't survive. [substeps] If you want to get a head start, you can start the seeds indoors up to 3 weeks before the last frost. Ending4: While ripe butternut squash seeds should be harvested before the last frost, immature butternut squash will be ready to harvest soon after the last frost. [title] Moisten the eggshell or root portion.

Answer format: ending1/ending2/ending3/ending4