The same place you get all the other servants, at the Ardougne Servants guild.
Fishing Guild, Catherby Burgh de Rott, West of Elf camp, Jatizso, Rellekka.
rellekka is above seers village. if you simply follow the path above the seers village bank and take the path more Northwest bound you should find it very easily. you can also use the world map (globe button) you have on screen near the mini map on the upper right portion of your screen to help you find Rellekka.
You can buy a watering can for farming from a farming shop found in North of East Ardougne, South Falador, Port Phasmatys.
Sanfew can be found upstairs in the herblore shop in Taverley.
Free world: Barbarian Village Crafting guild Draynor Village Members: East Ardougne Rellekka Exam Centre (south east of varrok) Sophanem Reference: Link below
In West Ardougne.
Access to West ARdougne is enabled during the quest Biohazard.
Robbing them from a chest in ardougne ( need to pick-lock a door and go upstairs near center ).RC Minigame.Buying Them.
South of east ardougne.
North-Eastern Ardougne.
Yes.
You can find them at Fremennik Slayer Dungeon southeast of Rellekka.
You can steal silk from a trader in Ardougne Market.
It is beleived to be pronounced ar-doyne according to Postbag from the Hedge.
The same place you get all the other servants, at the Ardougne Servants guild.
Theres is one in Catherby, Falador, Varrock & Ardougne