Change its network to Ropsten Test Network (Ethereum testnet)
Get some free Ropsten ETH (to spend on planting trees)
Visit Treejer app
Click on "Add Trees" button in the right sidebar
Select number of trees to plant and click "Next"
Confirm the transaction in your wallet (For Metamask users, a new window pops up)
Done! Please wait a few moments until your transaction is confirmed in the background
If you don't see you new trees, refresh your forest page.
If you found any bugs during your experience, feel free to report it. We usually respond in a few hours.