Bring your Alocasias indoors when temperatures dip into the low 50s, and put them back outside in the same range.
You can bring your potted banana trees into the house and place them in a sunny spot. Their growth will slow for the winter, and they won’t need as much water.
Before you bring your basil plants indoors, give them a light pruning to encourage healthy growth. You can remove about ⅓ of the plant without causing undue stress.
A good time to relocate your begonias is when the thermometer registers 45°F. Begonias do appreciate some cooler weather in the winter, so keep them out of the kitchen, and instead, consider keeping them just inside the front door or in a stairwell if you have a cool one.
Before you bring your cacti indoors, it is best to wait until the weather gets close to that 40°F mark. The cooling weather tells the cactus to initiate dormancy, which makes your plant much easier to care for through the cooler months.
Caladiums will stop growing and producing leaves at about 55°F. They can be left in the ground beyond this, but the sooner you bring them indoors, the lower the risk of losing the bulbs to cold damage.
Move your calla lilies to the shade for a few weeks before bringing them indoors for the winter. As the temps near 50°F, your callas will want to enter dormancy. Stop watering them as the leaves die, then remove all dead foliage and bring them indoors.
Their leaves die back in the winter, so bringing them indoors won't be a big space waster. Cut canna leaves all the way to the soil and store them in a cool, dry space where the temperature stays around 40°F or warmer.
Most citrus trees can withstand freezing temps. However, if there is to be an extended period of cold weather, where the nighttime temperatures dip into the 20s for a few days or more, these plants will need to come indoors.