55 days. Longtime Nelson fans, do not despair! Napoli is a first-rate Nantes-type carrot that rivals and surpasses Nelson in size and early maturity. Among the earliest of our spring-sown carrots, the 7-8 inch, bright orange roots have a fine texture and a mild, juicy crunch. Plants have tall, strong tops for easy harvest and produce uniform, smooth, cylindrical carrots with narrow shoulders. MA. IR: Ad, Ar, C, P.