It’s also possible that you might want to grow some rose of Sharon plants into mature specimens.
If so, the ease with which these plants self-seed also makes them very easy to propagate intentionally.
Another group from Proven Winners are also non-seeders: the Chiffon or Satin series.
The Spruce / Ana Cadena
With rose of Sharon, the seeds are contained in small seed pods that appear just below the blooms.
When the flowers of your shrub are done blooming, simply deadhead them.
This will nip seed production in the bud and eliminate all those annoying seedlings.
The Spruce / Ana Cadena
check that you remove not just the flower, but also the developing seed pod at its base.
If you fail to implement this preventive control measure, you will have a tougher row to hoe.
The fully developed seed pods eventually dry out and split open, dropping the seeds near the parent plant.
The Spruce / Ana Cadena
Products such as Preen are of this pop in.
Applying a preemergent herbicide will prevent all seeds from taking root, whether they are wanted or unwanted.
It is generally best to try non-chemical means of preventing self-seeding before reaching for a herbicide.
The Spruce / Ana Cadena
Spotted early, the seedlings aren’t difficult to pluck from the soil.
This technique will smother the rose of Sharon seedlings (along with other plants) within a month.
These are non-selective plant killers, though, so you better be very careful in how you apply them.
The Spruce / David Beaulieu
They will kill or badly damage any living plant they touch.
you might simply let nature do the work for you.
Then, dig up your new rose of Sharon plants and transplant them to your desired location.
Or, transplant them into small pots to give away to others.
you’re free to cover the pods with nylon bags to catch the seeds as they fall.
In spring, plant the seeds 1/4 to 1/2 inch deep in humus-rich soil.
Give them full sun and water them deeply.
Watch out for birds eating exposed seeds.
