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Released 15 May 2007 (Update)
Members Yes
Level Magic 68
Spellbook Lunar
Type Utility
Experience 65
Runes 1Fire 3Water 1Astral
Casting speed 3 ticks
Quest Dream Mentor
Description Fills certain vessels with water
Sound Effect
Humidify icon (mobile).png

The humidify spell will fill all empty water-carrying vessels in a player's inventory with a single cast including: buckets, fishbowls, jugs, vials, watering cans (including Gricoller's can), unwatered saplings, waterskins, bowls, and clay. Somewhat surprisingly, it does not work on Empty cups. It yields 65 experience per cast regardless of the number of vessels filled. It can also be used to extinguish the wall of flames in the Chambers of Xeric when fighting Great Olm or to refill waterskins in the Kharidian Desert instead of needing to cut cacti. To use this spell, a player must have completed Dream Mentor.

A steam battlestaff, or staff of water and tome of fire or vice versa can be used for maximum efficiency. It can be used to train Magic while making profit from some of the items below:

Input Output Profit
Bowl.png Bowl Bowl of water.png Bowl of water 37
Bucket.png Bucket Bucket of water.png Bucket of water 21
Clay.png Clay Soft clay.png Soft clay 32
Jug.png Jug Jug of water.png Jug of water 31
Vial.png Vial Vial of water.png Vial of water 1
Waterskin(0).png Waterskin(0) Waterskin(4).png Waterskin(4) 88

To maximise experience per hour with this spell, put a fishbowl underneath the spell (similar to High Level Alchemy) and to the "F1" and "F6" keys (or custom F-keys) to switch between spellbook and inventory. Left-click empties the fishbowl. Casting High Level Alchemy is always cheaper when alchemising profitable items while this method always results in loss. Upon hearing the sound effect, all vessels have been filled.

Money making[edit | edit source]

The following money making guide is available for Humidify:

MethodHourly profitSkills
Humidifying clay655,260
  • Magic 68

Saplings[edit | edit source]

Because it is time consuming and gives little to no experience, planting tree seeds in filled plant pots to grow saplings is often skipped in favour of buying the saplings directly from the Grand Exchange. This opens up an opportunity to grow saplings for profit. Like all methods involving large amounts of buying and selling, which require a relatively high capital to start, it is recommended to test the market by growing one sapling first to make sure it is profitable.

To plant the seeds in the pots, use one of them on the other with a gardening trowel in your inventory. This produces a seedling. When all the plant pots are filled with seeds, cast Humidify to water them. These watered seedlings will take approximately five minutes to turn into saplings, but this will happen even when banked. Repeating this process quickly will make around 1,700 saplings an hour.

Please note that tree seeds have a relatively low buying limit, so you may want to stock up on them beforehand, or grow several different trees at once.

Click here to refresh the prices on the table below.

Tree seed Farming level required Seed price Sapling price Profit per seed Daily volume
Acorn 15 31 293 257.60 12903
Apple tree seed 27 5 207 197.60 5222
Willow seed 30 38 270 227.60 25256
Banana tree seed 33 1 96 90.60 3434
Teak seed 35 20 470 445.60 7580
Orange tree seed 39 7 97 85.60 2166
Curry tree seed 42 4 253 244.60 5123
Maple seed 45 8,970 10,310 1,335.60 29066
Pineapple seed 51 9 244 230.60 8765
Mahogany seed 55 2,130 2,751 616.60 27379
Papaya tree seed 57 145 866 716.60 48195
Yew seed 60 27,859 29,673 1,809.60 43682
Palm tree seed 68 18,026 19,868 1,837.60 43374
Calquat tree seed 72 42 505 458.60 15944
Magic seed 75 67,077 70,556 3,474.60 52875
Dragonfruit tree seed 81 154,916 158,854 3,933.60 10479
Celastrus seed 85 76,511 78,074 1,558.60 4993
Redwood tree seed 90 20,584 22,833 2,244.60 4154

Cost[edit | edit source]

Spell cost
1Astral rune.png 1Fire rune.png 3Water rune.png 76
Combo runes
1Astral rune.png 1Fire rune.png 3Mud rune.png 382
1Astral rune.png 3Water rune.png 1Lava rune.png 82
1Astral rune.png 3Water rune.png 1Smoke rune.png 110
1Astral rune.png 3Steam rune.png 147
1Astral rune.png 1Fire rune.png 3Mist rune.png 340
1Astral rune.png 1Fire rune.png Staff of water.png Alt64
1Astral rune.png 3Water rune.png Staff of fire.png Alt72
1Astral rune.png Steam battlestaff.png 60
Main and off-hands
1Astral rune.png 3Water rune.png Tome of fire.png 72
1Astral rune.png 1Fire rune.png Tome of water.png 64
1Astral rune.png Staff of water.png AltTome of fire.png 60
1Astral rune.png Staff of fire.png AltTome of water.png 60

Changes[edit | edit source]

Date Changes
9 September 2021

Gricoller's Watering Can may now be filled by casting the Humidify Spell.

30 October 2014
(update | poll)

The Lunar spell Humidify will now work on saplings held in your inventory.

15 August 2013
(update | poll)

The 'Humidify' spell can now be used to soften clay.

22 February 2013

This content was included when the Old School RuneScape servers officially launched.