To propagate hydrangeas in water, you need a healthy softwood cutting of 6-8 inches that is submerged in water and allowed to root. Start the process in spring when the plant is in its active growth phase. Dip the stem into rooting powder and place it in a clear glass filled with water.
However, rooted hydrangeas in water is not always reliable as stems often rot before they develop roots. Place the pot in partial sunlight and water the cutting regularly to ensure the soil is moist but not soggy. After 2-3 weeks, a robust new root system forms. You can also wait until foliage emerges from the soil, indicating new roots have formed. Clip the rooted plant from the parent plant and pot.
While hydrangea cuttings can root in water, soil propagation is generally more successful. If you choose to root in water, place the cutting in a jar with water. Due to their woody nature, hydrangea cuttings cannot be propagated in water, so you need to insert them into a pot of gritty compost. Propagating in water can lead to a weaker root system that might fail when moved into soil outside, but this does not happen 100% of the time.
To propagate hydrangea plants in water, plant them in a cutting-friendly, well-draining mix made of organic matter. This will help prevent rot and ensure a healthy root system for the plant.
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