English Standard Version (ESV)
Imagine planting an apple tree, and instead a blueberry bush rises up in its place. Let's say you sow a field of wheat, and instead corn grows up. You'd be surprised and curious, but you'd at least still have productive crops.
Here, Isaiah is telling us that where thorns and weeds have been planted, trees have arisen. What once might have been plucked from the ground is replaced by trees that provide shade and beauty. What might have not been valued is replaced with something of value.
The reversals of God are even greater for us. We have sown death through our sin, but instead of death growing and taking our lives, life has replaced it. God has done the miraculous and given us life where there was once death. God has granted joy and freedom where sorrow might have dominated the landscape. We are blessed with a God of infinite freedom who takes what is often our worst and turns it into something useful, building his kingdom using our broken and redeemed lives!!!