Beans should blow before May doth go.

The proverb sets a seasonal expectation: bean plants should produce flowers while it is still May. It presents flowering as a sign of timely growth, not as a guarantee for every plant.

Its point is to notice whether the crop has reached an expected stage before the month passes. The word “should” makes this a rule of thumb rather than an exact deadline.

Use the saying when discussing the progress of growing beans as May draws to a close. It can express an expectation that blossoms will have appeared, or concern when they have not.