growing condition that needs to be addressed is the soil. Hibiscuses
are quite adaptable to soil types. Providing a location with
highly organic soil will greatly enhance growth and flower production.
To increase organic matter, it may be advisable to mix sphagnum
peat moss into the planting soil. After planting, the soil needs
to be kept moist constantly for the first year or two. When
they are fully established, they can accommodate some drought
or excessive moisture.
protection in harsh climates, zones 4 through 8, is also an
issue for growing hibiscus. Providing mulch during winter
is imperative. Pile the mulch up to 12 inches deep to keep
the ground from freezing around the root system. In zone 8,
the mulch does not need to be as thick as in zone 4.