If you worry about underground insects often disrupt with your garden, There is an easy solution that is raised garden bed with cinder blocks. This DIY project is not hard to make, particularly if you have some blocks.Here we have a tutorial which is from a project involving an 18 feet long by 4.5 feet wide garden. Just markhe area and start digging a few inches in the ground and then make the ground as level as you can. Next lay the blocks, which is not very easy to make in a level way.But it must be such,. You must do it slowly with 32 blocks. Enjoy!