Managing pests on the hibiscus, amaryllis and shamrocks is an annual battle.  I love those plants so I have made much effort to protect them from heading to compost.  The birds pretty much handle pests during the spring and summer, but it is a bit of work when the plants come in for fall and winter.

I transition the plants from outdoors to the tile to the carpet over about a week. They stay on the tile a few days to get their initial acclimation to the indoor weather.  During that time they do shed leaves (and some ladybugs, gnats, etc.)  During that time I also spray the hibiscus and the amaryllis dirt with a mild solution of Sol-U-Mel.  The shamrocks are still quite full so they get that treatment later.

Once the plants are ready to go to their indoor location for fall/winter, I put them on a plastic bag or thick piece of cardboard for a while.  During that time they are kind of messy.  The hibiscus drops leaves and buds and the shamrock stems begin to die back.

All of that needs to be pulled off the plants, picked up and thrown away.  Leaving that on and around the plants invites issues.

Throughout the fall and winter I also add one drop of dish detergent to a quart of water and use that on the soil to keep pests at bay.

By spring I am tired of the routine, and inevitably gnats are starting to appear.  At first sign of frosty nights being gone, the plants go back outside.  They die back a bit (the birds pluck the shamrock material for their nests) but then they come back stronger.