{"key":"hardest-crops-to-grow-in-short-seasons","title":"Hardest Crops to Grow in Short Seasons","shortTitle":"Hardest Short-Season Crops","slug":"hardest-crops-to-grow-in-short-seasons","permalink":"/data/rankings/hardest-crops-to-grow-in-short-seasons/","description":"Crops ranked by how much timing pressure they create in short frost windows and lower-GDD locations.","updated":"2026-05-23","category":"Data ranking","methodology":"This ranking uses published crop-city rows where frost-free days are 140 or fewer, or available GDD is 1500 or lower. Crops are ranked by average Crop Fit score, GDD margin, risky/borderline locations, and whether variety classes clearly fit the season.","caveat":"This identifies crops that are more timing-sensitive outdoors, not crops that are impossible. Variety speed, microclimate, protection, and gardener skill can change the result.","top":{"rank":1,"cropKey":"watermelons","cropName":"Watermelons","cropCategory":"warm-season","targetGdd":1350,"score":68,"label":"Difficult","averageFitScore":42,"averageGddMargin":-116,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":128,"noClearVarietyFitCount":0,"reason":"Watermelons often run short on heat margin in short-season locations, so fast varieties or protection matter."},"easiestOfThisSet":{"rank":24,"cropKey":"spinach","cropName":"Spinach","cropCategory":"cool-season","targetGdd":450,"score":0,"label":"Usually manageable","averageFitScore":100,"averageGddMargin":2212,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Spinach are not always hard, but they are less forgiving than simpler short-season crops."},"entries":[{"rank":1,"cropKey":"watermelons","cropName":"Watermelons","cropCategory":"warm-season","targetGdd":1350,"score":68,"label":"Difficult","averageFitScore":42,"averageGddMargin":-116,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":128,"noClearVarietyFitCount":0,"reason":"Watermelons often run short on heat margin in short-season locations, so fast varieties or protection matter."},{"rank":2,"cropKey":"peppers","cropName":"Peppers","cropCategory":"warm-season","targetGdd":1300,"score":65,"label":"Difficult","averageFitScore":45,"averageGddMargin":-66,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":119,"noClearVarietyFitCount":0,"reason":"Peppers are timing-sensitive in short seasons even when they are not impossible outdoors."},{"rank":3,"cropKey":"winter-squash","cropName":"Winter Squash","cropCategory":"warm-season","targetGdd":1300,"score":65,"label":"Difficult","averageFitScore":45,"averageGddMargin":-66,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":119,"noClearVarietyFitCount":0,"reason":"Winter Squash are timing-sensitive in short seasons even when they are not impossible outdoors."},{"rank":4,"cropKey":"pumpkin","cropName":"Pumpkin","cropCategory":"warm-season","targetGdd":1300,"score":65,"label":"Difficult","averageFitScore":45,"averageGddMargin":-66,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":119,"noClearVarietyFitCount":0,"reason":"Pumpkin are timing-sensitive in short seasons even when they are not impossible outdoors."},{"rank":5,"cropKey":"melons","cropName":"Melons","cropCategory":"warm-season","targetGdd":1200,"score":58,"label":"Difficult","averageFitScore":51,"averageGddMargin":34,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":99,"noClearVarietyFitCount":0,"reason":"Melons are timing-sensitive in short seasons even when they are not impossible outdoors."},{"rank":6,"cropKey":"tomatoes","cropName":"Tomatoes","cropCategory":"warm-season","targetGdd":1200,"score":56,"label":"Difficult","averageFitScore":53,"averageGddMargin":48,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":96,"noClearVarietyFitCount":0,"reason":"Tomatoes are timing-sensitive in short seasons even when they are not impossible outdoors."},{"rank":7,"cropKey":"sweet-corn","cropName":"Sweet Corn","cropCategory":"warm-season","targetGdd":1100,"score":48,"label":"Mixed","averageFitScore":60,"averageGddMargin":148,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":83,"noClearVarietyFitCount":0,"reason":"Sweet Corn are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":8,"cropKey":"beans","cropName":"Beans","cropCategory":"warm-season","targetGdd":900,"score":35,"label":"Usually manageable","averageFitScore":73,"averageGddMargin":348,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":59,"noClearVarietyFitCount":0,"reason":"Beans are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":9,"cropKey":"cucumbers","cropName":"Cucumbers","cropCategory":"warm-season","targetGdd":800,"score":30,"label":"Usually manageable","averageFitScore":78,"averageGddMargin":448,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":45,"noClearVarietyFitCount":0,"reason":"Cucumbers are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":10,"cropKey":"zucchini","cropName":"Zucchini","cropCategory":"warm-season","targetGdd":750,"score":27,"label":"Usually manageable","averageFitScore":81,"averageGddMargin":498,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":37,"noClearVarietyFitCount":0,"reason":"Zucchini are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":11,"cropKey":"basil","cropName":"Basil","cropCategory":"warm-season","targetGdd":700,"score":25,"label":"Usually manageable","averageFitScore":82,"averageGddMargin":534,"averageFrostFreeDays":126,"shortSeasonLocations":193,"riskyLocationCount":27,"noClearVarietyFitCount":0,"reason":"Basil are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":12,"cropKey":"onions","cropName":"Onions","cropCategory":"cool-season","targetGdd":1300,"score":17,"label":"Usually manageable","averageFitScore":84,"averageGddMargin":655,"averageFrostFreeDays":119,"shortSeasonLocations":170,"riskyLocationCount":21,"noClearVarietyFitCount":0,"reason":"Onions are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":13,"cropKey":"potatoes","cropName":"Potatoes","cropCategory":"cool-season","targetGdd":1100,"score":10,"label":"Usually manageable","averageFitScore":90,"averageGddMargin":855,"averageFrostFreeDays":119,"shortSeasonLocations":170,"riskyLocationCount":10,"noClearVarietyFitCount":0,"reason":"Potatoes are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":14,"cropKey":"cauliflower","cropName":"Cauliflower","cropCategory":"cool-season","targetGdd":1000,"score":2,"label":"Usually manageable","averageFitScore":98,"averageGddMargin":1554,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Cauliflower are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":15,"cropKey":"broccoli","cropName":"Broccoli","cropCategory":"cool-season","targetGdd":900,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1654,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Broccoli are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":16,"cropKey":"cabbage","cropName":"Cabbage","cropCategory":"cool-season","targetGdd":1000,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1662,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Cabbage are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":17,"cropKey":"carrots","cropName":"Carrots","cropCategory":"cool-season","targetGdd":750,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1804,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Carrots are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":18,"cropKey":"swiss-chard","cropName":"Swiss Chard","cropCategory":"cool-season","targetGdd":750,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1804,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Swiss Chard are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":19,"cropKey":"kale","cropName":"Kale","cropCategory":"cool-season","targetGdd":700,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1854,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Kale are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":20,"cropKey":"beets","cropName":"Beets","cropCategory":"cool-season","targetGdd":650,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":1967,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Beets are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":21,"cropKey":"strawberries","cropName":"Strawberries","cropCategory":"cool-season","targetGdd":600,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":2017,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Strawberries are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":22,"cropKey":"peas","cropName":"Peas","cropCategory":"cool-season","targetGdd":600,"score":1,"label":"Usually manageable","averageFitScore":99,"averageGddMargin":2088,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Peas are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":23,"cropKey":"lettuce","cropName":"Lettuce","cropCategory":"cool-season","targetGdd":500,"score":0,"label":"Usually manageable","averageFitScore":100,"averageGddMargin":2162,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Lettuce are not always hard, but they are less forgiving than simpler short-season crops."},{"rank":24,"cropKey":"spinach","cropName":"Spinach","cropCategory":"cool-season","targetGdd":450,"score":0,"label":"Usually manageable","averageFitScore":100,"averageGddMargin":2212,"averageFrostFreeDays":119,"shortSeasonLocations":167,"riskyLocationCount":0,"noClearVarietyFitCount":0,"reason":"Spinach are not always hard, but they are less forgiving than simpler short-season crops."}]}