Look at your corn in May, You'll come weeping away; Look at the same in June You'll come home in another tune.

A crop that looks disappointing in May may look much more promising in June. Its early appearance need not predict how it will develop.

More broadly, the proverb counsels patience with something still in progress. A discouraging first impression may change when it has had time to grow.

Use it to discourage a firm judgment about a crop based on how it looks early in the growing season. It can also suit a developing project whose first results seem poor but may improve with time.