Farming Plots
There are various Farming Plots located around RuneScape (27 in total), and can easily be found by using the world map on the official RuneScape site. Open the "Overview" and "Key," and go to the last page in the key. Click on the Farming Patch symbol and a yellow dot will blink where a Farming Patch exists.
Also, for quick reference, see the Farming Patch Locations Map if you need help!
Vegetables, Flowers & Herbs (Allotment)
Northwest of Phasmatys
North of East Ardougne
North of Catherby
Old Farm, south of Falador
Bushes
Rimmington
West of the Champion's Guild
South of East Ardougne (near the Monastery)
West of Etceteria
Regular Trees
West of Lumbridge
Falador Park
East of Taverley
Southeast of Varrock Castle
West of the Agility Course in the Tree Gnome Stronghold
Fruit Trees
Southeast of Catherby
South of the port in Brimhaven
Gnome Stronghold (Agility Course)
West of Tree Gnome Village
Spirit Trees
Port Sarim
Northeast of Brimhaven
South of Etceteria
Hops
North of Yanille
Northwest of Seer's Village
North of Lumbridge (near the Cows)
Southwest corner of Entrana
Other Plots
Southwest of Canifis - Mushrooms
West of Draynor Manor (inside fence) - Belladonna
Northeast of Al Kharid - Cacti
North of Tai Bwo Wannai - Calquat
Preparing Plots
Before you can actually grow anything, you need to prepare the plot so that your crops will grow. Be sure to have the following items in your inventory:
Rake
Bucket of Compost
Seed Dibber
First, use your Rake to remove any and all weeds from the plot you are going to be using to grow your seeds. There should be 3 layers of weeds the first time you clear a plot, and you will receive 4xp per layer. Over time, the weeds will grow back and you will need to clear the plot again to use it.
After removing the weeds, you'll need to use a Bucket of Compost on the plot before any seeds can be planted. You can either buy compost from the Farming Shops for about 20gp, the nearby Gardeners, or you can make your own. You will earn 18 experience for spreading Compost in each plot.
Once the compost is in the plot, be sure to be carrying a Seed Dibber in your inventory. Click on a seed and use it with the cleared, nutrient-rich plot to use the Dibber to make a hole and plant the seed.
Composts
There are 2 different kinds of compost: regular Compost, and Super Composts. The best way to see if an item will make either regular or super compost is to use the item with a nearby Gardener. He will tell you what kind of compost it will make.
Note: Using a Tomato on a Compost Bin will not yield compost, but instead a Rotten Tomato! The only real use for these is in the Duel Arena, where you can throw them at other players that are dueling.
To make your own compost, you will need to collect various grown materials such as Weeds, grown produce, flowers or others, and place them in a Compost Bin. Once it's full, close the lid and wait for about an hour for it to be ready. You will need 15 empty buckets to collect the compost from the bin. Then you can refill it while watching over your crops!
For each bucket of Compost you remove, you'll earn 4.5 Farming experience.
Super Compost
Super Compost allows for your crops to grow faster and it ensures that your plants are more resistant to disease or dying. They will also yield or grow more produce than using regular Compost. For making Super Compost, you will earn 8.5 Farming experience per bucket you fill.
To make your own Super Compost, you'll need to gather 15 materials and use them on the Compost Bin:
Pineapples or better fruits
Avantoe or better herbs
Jangerberry or better berries
Watermelon
Tree Roots
Any combination of these will yield Super Compost. So, 10 Pineapples, 2 Jangerberries and 3 Watermelons will make Super Compost. However, adding something else will only yield regular compost. for instance, if you add 10 Pineapples, 2 Jangerberries, 2 Watermelons and 1 Potato will only make regular compost.
The best way to make Super Compost is by picking or buying Pineapples. You can either pick them from the Pineapple Trees located near Brimhaven, or you can buy them for a few gp from Heckel Funch in the Grand Tree.