Sanguisorba, commonly known as Burnet, is a herbaceous perennial valued for its feathery foliage and distinctive bottlebrush-like flowers.

1. Propagation by Seed

Step-by-step process:

1. Collecting Seeds:
   • Allow the flower heads to mature and dry on the plant in late summer or early autumn.
   • Once the seed pods have turned brown, cut them from the plant and place them in a paper bag to dry further.
2. Preparing for Sowing:
   • Sanguisorba seeds can be sown either in autumn or early spring.
   • Use a seed tray filled with well-draining seed compost. Gently press the seeds into the surface, then lightly cover them with a thin layer of compost or vermiculite.
3. Germination:
   • Place the tray in a cold frame or a sheltered outdoor spot if sowing in autumn, as the seeds benefit from a period of cold stratification.
   • If sowing in spring, keep the tray in a cool environment but avoid frost.
   • Germination may take several weeks, so be patient and ensure the compost stays moist but not waterlogged.
4. Transplanting:
   • Once seedlings have developed a few true leaves and are large enough to handle, transplant them into individual pots.
   • Harden off young plants gradually before planting them into the garden in late spring.

Note: Sanguisorba grown from seed can take a couple of years to flower, but it allows for the possibility of new, unique varieties due to genetic variation.

2. Propagation by Division

Step-by-step process:

1. When to Divide:
   • The best time to divide Sanguisorba is in early spring or autumn when the plant is not actively flowering. Division allows you to propagate plants that are identical to the parent plant.
2. Lifting the Plant:
   • Use a garden fork or spade to gently lift the entire plant out of the soil. Take care to minimise damage to the roots.
3. Dividing the Clump:
   • Once the plant is out of the ground, use a sharp knife or spade to divide the root ball into smaller sections. Each section should have a healthy portion of roots and shoots.
4. Replanting:
   • Replant the divisions immediately into prepared soil enriched with organic matter.
   • Water well after planting to help the divisions establish.

Advantages of Division: This method is quicker than growing from seed and guarantees that the new plants will have the same characteristics as the parent plant. It also helps rejuvenate older plants by preventing overcrowding.

Care After Propagation

Regardless of the propagation method, ensure that the newly planted Sanguisorba receives plenty of water until established. They thrive in full sun or partial shade and prefer moist, well-drained soil. Regular deadheading can encourage more blooms and prolong flowering throughout the season.

By following these steps, you can successfully propagate and enjoy Sanguisorba in your garden, enhancing its beauty and supporting local wildlife, including pollinators like bees.