How to Winterize Hibiscus
How you winterize hibiscus will vary depending on where you live and the type of hibiscus you own. There are two different categories for hibiscus; hardy or tropical. Tropical hibiscus have minimal winter protection and will often times have to be brought indoors if the winter temperatures drop below 40 degrees. Hardy hibiscus can generally withstand these cold temperatures. Therefore, you must identify the type of hibiscus you own and the climate you live in as winter approaches so that you can provide the plant with the proper care during the cold months.
Normally, you don't want to prune your hibiscus prior to bringing it in before winter. Pruning should wait until spring time. However, larger, more established hibiscus can do well, and often times flourish, when pruned before winter. Do not water often during this time, as they will not need it and it could cause damage to the dormant roots, such as root rot or mold. Hibiscus enjoy being fertilized during the winter, though the fertilizer should contain a very low nitrogen content and should be applied once every two weeks. Do not overfeed, as the plant does not need many nutrients. However, the added resources during the winter can translate into gorgeous foliage and blooms come spring time.
If placed in a warm enough area and provided enough light, your hibiscus may bloom during the winter. Keep the room at least 65 to 70 degrees. They can be kept in cooler locations, though this will prevent them from blooming. Insulated basements offer the perfect home for dormant plants, however keep in mind that tropical hibiscus can reach fairly large heights. Keep this in mind before you begin growing too many and end up with no where to put them once the temperatures begin to drop.
