Farming is a major part of RuneScape, and many players strive to get their farming skill level to the max. But what if we told you that you can get your farming skill level to 120 in one day? It is possible with a farming training method called the Supreme Growth Potion Method. 

The Supreme Growth Potion is a farming item that instantly grows whatever crop is in your farming patch. You can obtain these potions either by buying them or by using PlayOn form beans or Crocs equal favor. However, since beans or favor are the bottlenecks of this method, you want to get the best beans-to-XP ratio for your level. The best beans to XP ratio are golden dragon fruit seeds. When using a leafy instant growth potion, it costs 1,000 beans a pop. 

The method requires level 116 farming, but you can do it at level 108 farming by using the plus 8 pull score boost. You can obtain this boost by sitting in a portable world or in a busy area where a lot of people are skilling. You can also do this method at level 111 farming and use a pork pie for a plus 5 farming level boost. 

When doing this method, there are a few items that you should bring. These include golden dragon fruit seeds, some note paper to note your produce, some Supreme Leafy Growth Potions, and decorated farming urns. Decorated farming urns will increase your experience by a huge amount. You should also bring any farming level boosts, experience boosts, or pulse cores bonus XP and wisdomore that you may have access to. 

You should plant the golden dragon fruit seeds in a cactus patch, and the best one to use is the one at Hats Oasis, which you can get to by using Valkyrid lodestone or from the Karadet archaeology dig site. All you have to do is use your seeds on the patch, use the Supreme Growth Potion, spam-click to check its health, and then harvest it three times before clearing it. 

When doing this method, you can get a base experience rate of 4.27 million farming experiences per hour. You can get even better experience rates by using Decorated Farming urns and activating experience boosts like the Farmer's Outfit or Massive Farmer's Outfit. If you do this method during a double XP event, you can get a base experience rate of 8.5 million farming experiences per hour. If you add in urns and an Earn Enhancer, you can get up to 9.6 million farming experience per hour. 

To get to level 120 farming in one day, you would need 1,272 Supreme Leafy Growth Potions. This will take you around 8 and a half hours to complete 150 of these cacti per hour. However, you can decrease that time to around 5 hours by using an item called Liquid Patch Bomb, which costs around 100,000 RS GP. 

Overall, the Supreme Growth Potion Method is a great way for players to get their farming skill level to 120 in one day. With the use of experience boosts and urns, you can get the best experience rates possible and reach your farming goals quickly.