Matthew Poole and continuators on Proverbs 27:25

25 The hay appeareth, and the tender grass sheweth it self , and herbs of the mountains are gathered .

In their proper seasons. These things may be here mentioned, either 1. As the matter of his diligence. Take care that thy Hay and Grass may be well managed, and seasonably gathered for the use of thy Cattle. Or rather 2. As another Argument and encouragement to diligence, because God invites thee to it by the plentiful provisions wherewith he hath enriched the Earth for thy sake. Thou needest not compass Sea and Land for them, for God puts them into thy hand if thou wiltst but receive them.

Even the most barren parts afford thee their help.

Or, are to be gathered, as such passive Verbs are oft used, they are ripe and ready for the gathering. So this clause suits best with the former.