Ok so as I got 99 farming in game, I will make guide. I know Impulse has made one but I decided to make new one.
I just quickly include price of each seed :
Guam 1k coins.
Marrentill seed 1k coins.
Tarromin seed 1k coins.
Harralander seed 1k coins.
Ranarr seed 10k coins.
Toadflax seed 10k coins.
Irit seed 10k coins.
Avantoe seed 5k.
Kwuarm seed 10k.
Snapdragon seed 10k.
Cadanite seed 15k.
Lantadyme seed 5k.
Dwarf weed seed 10k.
Torsol seed 10k.
So what you wanna do is teleport to skills area, and take like 1m coins with you if you dont have that much, don't worry take what you got. So go to skills shop (bob) , we have to buy some seeds! What you wanna do is buy guam seeds to reach level 14 farming. Each seed gives you 440 xp so it should be fast. If you dont know where the herb patch is from bob walk north-west and you'll find all farming area! However you only need to use one patch which is 'herb patch'. You DO NOT need any tools such as spade, etc.
From levels 14-19 you wanna do marrentill herbs, they give you 560xp each, should not be a problem very fast and easy.
Levels 19-26 you wanna plant tarromin, they give 640 xp each, fast and easy.
Levels 26-38 you wanna do harralander seeds, reason I skipped some seeds is to safe you time from running from herb patch to shop and back. It still be easy, each seed give you 880xp.
Levels 38-50 you wanna plant harralander seeds, I skipped irit seed as you just waste time runing. Each seed give 1360 xp.
Levels 50-62 you wanna plant avantoe seeds, each seed give you 2200xp. Fast and easy. Smile
Levels 62-73 you can do snapdragon seeds they give 3520 xp each, once again no problem, fast and easy.
Levels 73-79 plant landtayme each give 5400 xp.
Levels 79-85 you can plant dwarf weed seeds. Smile They give 6840 xp each and are fairly fast.
So here it comes the final seed which is torsol, you gonna have to plant torsol 85-99, torsols are fast and give 8000xp each. At level 85 you have about 3m xp in skill, so you gonna need another 10m xp so I did calculations. 10million / the xp (8000) and it will tell you how many seeds you need at what I got now it says 1250 seeds. So not that much.
Farming is very fast skill because once you plant the seed you can pick up herbs straight away. Also you get full inventory very fast so I suggest to use mouse keys to drop herb you picked instead of banking them, it will safe you much time.
Also when you be getting herbs such as guam, clean them they give you herblore xp, you should reach 40 herblore while farming low level seeds.
Why I skipped some seeds? Well i did that to safe you a lot of time from running as I mentioned earlier in the guide, running and buying seeds for each level just be waste of xp.
Stay focus , its fast and everyone can do it. If you got any questions please leave a comment I'll come back to you personally. And as always get skill cape from home. Smile
`Jessie J