The "Barrel Cactus" or "Echinocactus grusonii" are characterised by their ribbed, cylindrical shape and come in a variety of sizes.
Originating from Mexico, this helpful cacti was was traditionally known as an aid for lost travellers in the desert as they habitually grow tilted towards the southwest.
This plant is fairly fast-growing at first, then the growth rate significantly slows down, taking up to 10 years to reach its maximum size.
Care Level Rating: Easy-Medium- depending on the home environment
Notes: These come in a variety of sizes with the largest measuring in at approx. 30cm in height and 25cm in width.