Isaiah 35:1

In these verses we have, I. The desert land blooming. In the foregoing chapter we had a populous and fruitful country turned into a horrid wilderness; here we have in lieu of that, a wilderness turned into a good land. When the land of Judah was freed from the Assyrian army, those parts of the country that had been made as a wilderness by the ravages and outrages they committed began to recover themselves, and to look pleasantly again, and to blossom as the rose. When the Gentile nations, that had been long as a wilderness, bringing forth no fruit to God, received the gospel, joy came with it to them, Psa 67:3, Psa 67:4; Psa 96:11, Psa 96:12. When Christ was preached in Samaria there was great joy in that city (Act 8:8); those that sat in darkness saw a great and joyful light, and then they blossomed, that is, gave hopes of abundance of fruit; for that was it which the preachers of the gospel aimed at (Joh 15:16), to go and bring forth fruit, Rom 1:13; Col 1:6. Though blossoms are not fruit, and often miscarry and come to nothing, yet they are in order to fruit. Converting grace makes the soul that was a wilderness to rejoice with joy and singing, and to blossom abundantly.

— Matthew Henry's Concise Commentary (public domain)