Q. I planted carrot seed that was new from the nursery this year. None of it grew. Should the nursery be willing to replace it?
A. The usual issue is that carrot and other small seed gets planted too deep. The problem is probably not a question of poor seed from the nursery. Try reseeding but do not bury the seed, just lay it on the prepared moist soil. Did you have success with lettuce? Lettuce is even more demanding about needing light to germinate than carrots. Do not cover it with soil either.