Propagation by seedlings
The garden hibiscus makes it easy for you to propagate because it seeds itself. Small sinkers grow under most bushes in summer, from which you can grow new bushes. If the sinkers have branched out, you carefully dig them out and plant them in a new place.
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Propagation by cuttings
Propagation by cuttings is suitable for both the garden marshmallow and the rose marshmallow and should be done in summer if possible. You need nursery pots (€ 14.90 at Amazon *) or smaller flower pots with potting soil, rooting powder and secateurs (everything from the garden center).
First you cut off shoots up to 15cm long with at least 3 eyes from the hibiscus and remove the lower leaves. You dip the cuttings in rooting powder and then place them in pots with potting soil. It is important that the earth always remains moist. In a light, warm location - a greenhouse is ideal - the cuttings will take root after a few weeks.
When the first leaves show up, you can move the cuttings into larger pots or into the garden. Even after planting, the hibiscus needs regular watering.
Propagation by seeds
Propagation by seeds requires a little more patience. With the garden marshmallow, you only need to collect the seeds in the garden. On the other hand, you will have to buy seeds from the hibiscus rosa sinensis. The right time to sow is spring or early summer so that the young plants can develop well by winter.
The collected seeds are first scratched a little, placed in a pot with potting soil and loosely covered with soil. So that the seeds are not washed away when watering, it is better to moisten the soil with a spray bottle.
Just like the cuttings, the seeds need a warm, light place. Once the plants have developed well and the first leaves have formed, you can transplant them.
Propagation of the garden hibiscus by means of sinkers
Another method of propagating the garden hibiscus is by subsidence. To do this, bend a suitable shoot down, slightly scratch the bark and place it in a prepared recess with this point. You secure the branch with a wire and cover it with soil, with the end of the branch sticking out of the soil.
After a while, the branch forms its own roots at the intersection. Once the countersink is big enough, it can be cut off - preferably in late spring - and planted in a suitable place.
Tips & Tricks
If you don't have a greenhouse or indoor greenhouse, you can put a transparent plastic bag or a freezer bag over the pot. Place the pot in a bright place on a windowsill out of the sun and air the bag regularly to prevent mold from forming.