Pyrethrum Herbs: How to Grown and Use

Pyrethrum contains a natural insecticide which is lethal on insects, yet safe for animals and humans. A few sub-types in this herb group, such as 'chop suey greens' are frequently used in oriental dishes. Taoists add this plant to their fabled 'elixir of immortality'. It is always interesting to discover the history behind the plant. This dainty flower resembles German Chamomile in appearance, and makes a cheerful addition to any household herb garden.

To Grow:

This hardy perennial prefers full sunlight, and well drained, alkaline soil. Plants should be sown in the late spring or early summer, once the weather is clear of frost. As soon as seedlings reveal themselves, thin the plants to twelve inches. The Pyrethrum does poorly as an indoor plant. Only the flowers are harvested for long term use. Dry them as you would any other herb, and store in an air tight container.

To Use:

This plant bears attractive flowers throughout the growing season, which make a pleasant addition to flower arrangements. These plants are tough, and once cut will outlive most other flowers.

For culinary purposes, young leaves can be add to summer salads, and treated the same as watercress. They don't taste bad in a stir fry, but since they wilt quickly, add them at the very last minute to preserve flavor. The flower is frequently added to oriental dishes, however the petals can be eaten raw in salads.

For household purposes only the flower is used. As mentioned before pyrethrum is a natural insecticide. When handling the powder, you should wear gloves as prolonged exposure can cause skin irritation. To use this, dry the flower heads, and grind them into a fine powder. This can be sprinkled directly onto areas where nasties like to frequent. It will deter common household pests including bedbugs, flies, cockroaches, lice, fleas, mosquitoes, aphids, spider mites, and ants. Unfortunately, this plant does not discriminate. It will kill beneficial bugs as well. Never use this on ground surrounding a pond since it is toxic to fish.