A bushel of March dust is worth a king's ransom.

The saying praises a dry March, treating dust as a promising sign for farming. In the traditional agricultural view, soil that dries sufficiently early may be easier to cultivate and can support the season's fieldwork.

Its extravagant valuation emphasizes that a seemingly humble thing can have great practical value when it arrives at the right time. It expresses hope in favorable conditions, not a literal valuation of dust.

Use it when discussing weather, planting, or the unexpected value of dry early-spring conditions. It may also be applied figuratively when a modest resource becomes especially valuable because timing makes it useful; the agricultural image reflects a traditional belief, not a literal price for dust.