{"coordinates":{"lat":48.118,"lng":-123.43},"chain":{"slug":"lettuce-succession","primaryCrop":"lettuce-leaf","category":"continuous-harvest","source":"Johnny's Selected Seeds succession guide; Cornell Cooperative Extension"},"zone":{"zone":"8b","zoneNumber":8,"subzone":"b","minTempF":15,"maxTempF":20,"source":"prism-2023","resolvedFrom":"coords-nearest","distanceKm":2.9,"zip":"98362"},"frostDates":{"zone":"8b","lastSpring":"03-15","firstFall":"11-30","seasonDays":260},"year":2026,"phases":[{"phase":1,"crop":"lettuce-leaf","sowMethod":"direct_sow","intervalWeeks":2,"windowStart":"2026-02-15","windowEnd":"2026-04-26","sowingDates":["2026-02-15","2026-03-01","2026-03-15","2026-03-29","2026-04-12","2026-04-26"],"notes":"Choose loose-leaf and Batavian types for the most heat tolerance late in the spring window.","climateNote":"Season extends comfortably through June; keep sowing every 2 weeks until daytime highs cross 75F."},{"phase":2,"crop":"malabar-spinach","sowMethod":"transplant","intervalWeeks":null,"windowStart":"2026-04-26","windowEnd":"2026-07-13","sowingDates":["2026-04-26"],"notes":"Heat-tolerant climbing substitute when lettuce bolts; one planting on a trellis fills the summer salad gap."},{"phase":3,"crop":"lettuce-leaf","sowMethod":"direct_sow","intervalWeeks":2,"windowStart":"2026-07-13","windowEnd":"2026-09-11","sowingDates":["2026-07-13","2026-07-27","2026-08-10","2026-08-24","2026-09-07"],"notes":"Fall succession; pick cold-hardy varieties as the window closes.","climateNote":"Carries into November under a low tunnel."}],"climateType":"maritime"}