Ogres are found in several locations, most notably the Ogre city of Gu'Tanoth. The ogres found in the Combat Training camp can only be fought using ranged, magic or melee using a halberd.
The best place to kill ogres for Slayer is directly west of Yanille, near the little island surrounded by water, although the location may be crowded with cannon users that can make training there inhospitable; if that's the case, it is possible to kill the ogres camping in the ruins immediately to the North, behind a line of trees, as those are not affected by the cannon. Alternatively, if you have level 46 Thieving, then you can access the Chaos Druid Tower, that has seven ogres in its dungeon, where it is usually quiet.
The following drop rates are provided by Jagex, unless otherwise specified.
The average Ogre kill is worth 1,569.62.
There is a 19/128 chance of rolling the uncommon seed drop table.
|Snape grass seed||1||1/176.5||2,331||56|
|Poison ivy seed||1||1/543.1||23||99|
|Potato cactus seed||1||1/882.5||36||84|
|Dwarf weed seed||1||1/3,530.1||278||3|