Garden tools are easy to clean because they are so durable. Due to spending most of their time outside (whatever the weather), garden tools can be easily washed and dried after use. For a quick clean, stab your garden tools into a bucket of sand mixed with some oil. The sand will work to get off the dirt, while the oil will keep the wooden handles in top condition.
Alternatively, you can use the same method to clean your garden tools as you do for your hand tools – soap and water. It works a treat!