Compost mound

The Compost mound is a level 28 Summoning familiar. It is summoned using a Compost mound pouch, yields 0.6 Summoning experience. In addition to boosting your Farming level by 1 + 2% of your level by interacting with it, it also has 5 spaces to hold various seeds and/or composts for you. Occasionally it will generate some Super Compost or compost. It's possible to use a bucket on the Compost mound to fill the bucket with compost. This can work 48 times on one Compost mound since it'll damage 2 hitpoints. The Compost mound is immune to poison damage.

Generate compost
The Compost Mound's special move is called Generate Compost, and is activated by using a Generate compost scroll. It fills a nearby compost bin with compost, with a chance of creating a white partyhat.

Training
Using the Compost Mound's special move a player can train farming by buying buckets from a nearby General Store and filling a nearby compost bin as each regular compost yields 4.5 experience per bucket or 67.5 experience for the entire compost bin or if you lucky you get 8.5 experience per supercompost or 130 for the entire compost bin.

This can be repeated many times while waiting for your crops to grow. The easiest location to do this is in Catherby.