This herb dies back to below ground level each year in autumn, then fresh new growth appears again in spring.
- Position: full sun or partial shade
- Soil: moist, fertile soil
- Rate of growth: fast-growing
- Flowering period: May and June
- Hardiness: fully hardy
The leaves of this vigorous (but non-invasive) herb can be used to make a liquid fertiliser, which can then be applied to most plants including tomatoes. They can also be cut and added to the compost heap, where they will release nutrients while breaking down. Comfrey is high in potassium (K), which is required for fruit production, as well as potash (P) and nitrogen (N), and it has been found to be a better source of these three vital nutrients than some other sources (such as farmyard manure). Also, ‘Bocking 14’ is a prized non-seeding strain, so it wont self-seed and spread throughout your garden like other comfries can.
- Garden care: Mulch with well-rotted manure in spring and dead-head after flowering to encourage the growth of young foliage.