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How do you propagate singleflower knapweed?
Singleflower knapweed is mainly propagated by sowing and division. Its seeds are scattered easily, so it’s best to harvest them in batches, when the inflorescences turn yellowish-brown after the petals have fallen. The seeds should be sown in spring or fall.
If the sowing is performed in fall, it needs to be at a place protected from low temperatures, or planted indoor in a seedling tray and then transplanted in spring. It has strong viability and can self-propagate. The seeds successfully germinate on their own with enough water.
Perennial species can be also propagated by division. Division includes digging out a cluster of plants 2-3 years old, and separating them with a sharp knife, each cluster preferably containing 3-5 small buds. Individual clusters serve as new planting material. Division is generally carried out during spring or fall. The soil must be kept moist before the new roots have properly grown.
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