Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to harvest romaine lettuce [title] Harvest the romaine heads about 65-70 days after planting the seeds. [step] When grown from seeds, romaine lettuce takes only a little less than 3 months to fully mature. You can tell when the heads are mature by their visual appearance: they'll have a dark green color and look leafy and open.

Ending1: [substeps] The stalk will be visibly tender to the touch. You may also notice scales that flake off when you check for them. Ending2: In general, full mature romaine lettuce will have a wavy, wilted appearance that resembles wilted cabbage. [title] Purchase romaine lettuce from a farmer's market. Ending3: Once they've progressed enough for you to get a sense of their bright green color, it's mature. If you spend your time gardening, you can stop by a farmer's market to buy romaine lettuce. Ending4: [substeps] Unlike iceberg lettuce, the romaine heads will not be densely closed in upon themselves when mature. [title] Cut the entire head off above the base if you want a second harvest.

Answer format: ending1/ending2/ending3/ending4