Oleanders are most well-known for beautiful blossoms and a film with the same name. These evergreen plants flourish in warm climates, blooming from summer to fall. Most commonly, oleanders are grown in Florida, southern states, Texas and the West Coast. Oleanders work well for landscaping, although they do need protection from cold winter weather. Oleanders can survive outdoor weather in USDA zones 8 through 11, but anything lower than zone 9, it must be brought indoors for winter.
Keep oleanders in 10 to 20-gallon planter pots to make them easy to transfer indoors during cold temperatures. Keep the soil sandy and rich.
Let the oleanders complete their fall blooming process, which usually lasts through October. After all the blooms have fallen off, prune away with shears any dead or broken branches. If you wish the oleander plant to be a certain size to fit indoors, keep it pruned throughout the year so it doesn't grow too large.
Bring the oleander plant indoors after pruning. Keep it in a sunny spot where the plant will receive about six hours of sunshine per day. Keep them away from heaters or fireplaces so they don't dry out in the hot air.
Water the oleander once a week. Mist the leaves weekly with water to keep them hydrated.
Take the oleander back outdoors in the late spring to early summer when temperatures rise and there is no risk of frost.