遅おそ霜じも

お

そ

じ

も

Meanings

1

noun

late spring frost

Refers to frost that occurs later than usual in spring, potentially damaging crops.

nightfall, night

霜しも
霜 is the general word for 'frost'. 遅霜 specifically means a frost that comes late in the season.
晩ばん霜そう
晩霜 (ばんそう) is a synonym with the same meaning, but 遅霜 (おそじも) is more common.

Compound of 遅 (late) + 霜 (frost). The reading おそじも is a straightforward combination of the kun'yomi readings.