Crossandra 'Orange Firecracker Plant' -Crossandra are from tropical Africa and surrounding countries. The size of the Orange Firecracker plants will vary, depending whether it is grown as an indoor plant or outdoors. Crossandra bushes generally grow to the maximum height of 3 feet. Glossy green foliage and bright orange flowers add tropical essence to your garden. Crossandra are pet friendly plants as they are great indoor plants. Crossandra was given its common name ‘Firecracker Plant’ when the fruits were submerged in water and the seeds would ‘explode out’. Some seeds can be flung a few feet.