Zone-based seed starting countdown chart

Ready-to-use prompt

Create a home vegetable-garden seed-starting countdown chart keyed to a blank last-frost date. Show indoor sowing, hardening off, transplanting, direct sowing, succession planting, and a failure-notes row. Include tomatoes, peppers, cucumbers, lettuce, and herbs as examples. Do not claim it fits every climate; remind users to adjust by local extension guidance and seed packets.