A rooting hormone can be used to speed up root formation, however, roots will form without it. Keep the perlite moist at all times. Chrysanthemum cuttings will root in 3 to 4 weeks. Continue to pinch all shoots every 2 to 3 weeks until late June. This will produce full, mound-shaped plant.
Chrysanthemums sometimes become crowded in the garden.
The old, center portion of the plant dies back and the new growth occurs around the perimeter of the clump. Renovating chrysanthemum clumps every 3 or 4 years will encourage healthy growth, neat plant growth habit, and continued flowering. When new shoots appear in the spring, dig the entire clump. Use a sharp spade or knife to cut the clump into wedge-shaped sections, like a pie. Water and fertilize as described above.