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Farming is a Skill used to grow seeds into food, herbs or logs.
Aorpheat's Signet Ring, Weird Gloop and Generous Harvest Potions can increase the number of Herbs, Crops, and Logs received when harvested. Items which increase crop and herb yields also increase the Farming skill and mastery experience received.
Raising Farming to Level 99 will unlock the Farming Skillcape for purchase from the Shop. Equipping the skillcape increases the harvest quantity from crops by 20% and allows the player to add Compost to allotments, herbs, and trees for free.
Equipping Bob's Rake provides a 20% chance that Compost or Weird Gloop is retained in a plot when harvested.
Gaining Experience
Farming Experience is gained through two actions: Planting seeds and harvesting crops that survive.
 Planting a seed will grant the player that seed's base experience value
 Harvesting trees will grant a fixed amount of experience, while harvesting allotments or herbs will grant experience equal to the base experience value multiplied by the number of items harvested
For example, Potato Seeds have a base experience of 8, so if a player plants a plot with Potato Seeds and then harvests 5 Potatoes, they will receive 48 total experience: 8 for planting and then 40 for harvesting.
Since experience for allotments and herbs is tied to the number of items harvested, anything that increases the number of items harvested will also increase the amount of experience received. Trees give a fixed amount of experience for harvesting regardless of how many logs are acquired.
Mastery Unlocks
Item Mastery Unlocks
Level 
Unlock

1 
Each level provides increased Farming Yield.

16 
Receive up to 1 Allotment or Herb seed back from harvesting.

31 
Receive up to 2 Allotment or Herb seeds back from harvesting.

46 
Receive up to 3 Allotment or Herb seeds back from harvesting.

50 
No compost required to successfully grow.

61 
Receive up to 4 Allotment or Herb seeds back from harvesting.

76 
Receive up to 5 Allotment or Herb seeds back from harvesting.

91 
Receive up to 6 Allotment or Herb seeds back from harvesting.

99 
+20% Farming Yield. 10% reduced grow time for this Crop. Receive up to 8 Allotment or Herb seeds back from harvesting.

Mastery Pool Checkpoints
Pool % 
Pool XP 
Bonus

10% 
1,100,000 xp 
+5% increased Farming Mastery XP

25% 
2,750,000 xp 
Crops cannot die (Bonus applied when crop grows).

50% 
5,500,000 xp 
+5% increased Crop harvest

95% 
10,450,000 xp 
Reduced crop grow time by 10% (Bonus applied when crop is planted)

Total Mastery Pool XP

11,000,000

Crop Harvest Quantity
The harvest quantity (before any quantity bonuses are applied), [math] Q_h [/math], increases with the mastery level, [math] L_m [/math], according to the formula:
[math] Q_h = \left \lfloor 5 + 0.4L_m \right \rfloor [/math] after bonuses are applied, the harvest is then multiplied by 3 for allotments and herbs, and 7 for trees
where: [math] \left \lfloor x \right \rfloor [/math] is the floor function.
Mastery Level 
Harvest Amount herbs/allotments 
Harvest Amount trees

1 
15 
35

2 
15 
35

3 
18 
42

4 
18 
42

5 
21 
49

10 
27 
56

20 
39 
84

50 
75 
175

75 
105 
245

99 (before 20% boost) 
132 
308

Seed Return Chance
Starting at level 16 Mastery, there is a chance to get seeds back when harvesting herb and allotment plots.
Higher levels of mastery increase the chance and quantity of seeds that are returned. The average number of seeds returned, [math] Q_s [/math], varies with the mastery level, [math] L_m [/math] as follows:
[math] Q_s = \frac{n}{x} \left (x\frac{n+1}{2}\right) [/math]
where:
[math] x = \frac{L_m}{15} [/math]
[math] n = \left \lfloor x \right \rfloor [/math]
This means that at 75 mastery two seeds are returned on average and herbs become selfsustainable. At 99 mastery [math] L_m [/math] is replaced with 120, resulting in an average seed return of 3.5 seeds per harvest and making allotments selfsustainable.
Skillcape
The skillcape can be purchased from the store for 1,000,000 after the player reaches Level 99.
Skillcape 
Name 
Effect


Farming Skillcape 
+20% Increased Farming Yield. Adding Compost is free.

Pet
Chance to get pet is rolled once for each quantity of a crop you harvest.
The bonus from Larry, the Lonely Lizard is applied after other bonuses to harvest quantity, including the double harvest from Generous Harvest Potions.
Farming Plots
The player will originally only have access to a single allotment plot. Additional plots are unlocked by leveling up Farming and must be purchased with GP. Below are tables outlining the level requirements and costs for the plots:
Allotments
Herbs
Trees
Seeds
Seeds are required to start Farming and can be acquired from several sources, such as Thieving, Combat, or Woodcutting. Allotments require three seeds to plant, herbs require two, and trees require one.
Compost and Weird Gloop
Seeds planted without fertiliser have a 50% chance to yield crops after growing, unless either mastery level 50 or the 25% Mastery Pool Checkpoint has been reached. To increase the chance above 50% seeds must be fertilised using Compost. Each Compost used on a seed will increase its survival chance by 10%, raising the Compost Level to 5 will guarantee the crops survive.
As an alternative to compost players may use Weird Gloop. Only 1 Gloop is required to fill the compost bar and prevent crops from dying. In addition, it provides a bonus of +10% to harvest quantity.
If the player has reached the 25% Mastery Pool Checkpoint or has at least mastery level 50 in the seed being planted then there is no benefit to using Compost, as the crop is guaranteed to survive regardless of whether compost is applied or not. Using Weird Gloop does however still provide the benefit of +10% to harvest quantity.
Compost or Weird Gloop must be applied before seeds are planted. The 'Apply Compost to all Plots' and 'Apply Weird Gloop to all Plots' buttons will not affect seeds that are already planted, even if the plot currently doesn't have any fertiliser applied.
Allotments
Herbs
Trees
Potion
The Generous Harvest Potion has a chance to double crops/herbs/logs harvested.
Potion 
Tier 
Charges 
Effect


I 
5 
+5% chance for double harvest.


II 
10 
+10% chance for double harvest.


III 
15 
+15% chance for double harvest.


IV 
25 
+25% chance for double harvest.
