ભરણી ગળતાં તૃણ તો નહીં, જો કદી કૃતિકા વરસે નહીં.

bharaṇī gaḷatāṁ tr̥ṇa tō nahīṁ, jō kadī kr̥tikā varasē nahīṁ.

Literally: If Bharani passes without rain there is no grass, unless Krittika rains.
What it means: Rain during the Krittika nakshatra is essential for vegetation if earlier seasonal rains have failed.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.