Wakefield Museums and Castles

Pontefract Castle Pontefract Castle

Medieval herb garden blog 58: Good King Henry

Tuesday, February 17, 2026

Week 58 volunteer update

Not much to report this week. Carole carried out the weekly plant count. Then, Kim and Carole looked around the garden to decide what to tackle first. Not long afterwards, rain unfortunately stopped play!

Plant of the week: Good King Henry (blitum bonus henricus)

The name 'blitum' comes from the Greek 'bliton' (a tasteless vegetable). Good King Henry comes from the German 'guter Heinrich' ('Good Henry'). This is to distinguish it from 'böser Heinrich' ('Bad Henry'), the name for the poisonous plant 'dog’s mercury', 'Mercurialis perennis'.

In German culture the name Henry has often been given to elves, kobolds, or household spirits. It was often given to the name of crops in the garden. The “King” was then later added in English. However, there is no clear link with any particular king.

Good King Henry is native to Central and Southern Europe. It was thought to have been brought to Britain by the Romans.

Good King Henry is a hardy, bushy, deciduous, herbaceous perennial plant. It will grow in any soil type but prefers full or partial-shade and moist but well drained soil. Despite this, it grows quite happily in the south-facing, summer-concrete-hard dustbowl that is the Medieval Herb Garden!

It grows to a height of 3 ft (1 m) with a spread of 2ft (60 cm). It has a deep taproot. Its leaves are arrow-shaped, mid-green and 2 to 4 inches (5 to 10 cm) long. The leaves have a pair of broad pointed lobes near the base.

Good King Henry flowers between May and July. It produces tiny yellow-green flowers (3 to 5mm in diameter). These grown on tall, leafless spikes 4 to 12 inches (10 to 30 cm) long. Good King Henry can be cut back hard. It will regrow many times in a season.

A tall bushy green plant with lots of tiny green pre-flowering buds growing up the stems

Good King Henry growing in the Medieval Herb Garden

Culinary uses of Good King Henry

Good King Henry is also known as wild spinach. It was once one of the most popular green-leaf vegetables. It was used in stews and salads. Good King Henry was found in many Tudor gardens, as well as being grown in cottage gardens, for hundreds of years. This was until spinach became popular. The young shoots were eaten the same way as asparagus.

The flower buds are usually steamed in a similar way to broccoli. The small seeds can be ground into a flour which can then be added into bread. The roots can be crushed. They taste a bit like peanut butter.

However, it is advisable to cook the plant to reduce oxalic acid levels. These can aggravate conditions like arthritis, gout and kidney stones.

The seeds should be soaked before use to remove saponins. These can cause intestinal damage or digestive irritation. 

Use of Good King Henry as a dye plant

Good King Henry produces natural yellow-green to golden-yellow dyes from its leaves, stems, and whole plant.

Historically, it was used in European textile industries to colour wool and silk.

Folklore and other facts about Good King Henry

In traditional European folklore, Good King Henry was believed to have magical powers. It was sometimes used in love spells and other rituals.

In England, Good King Henry was sometimes used as a symbol of resurrection. It was associated with Easter celebrations.

The roots were given to sheep as a remedy for cough. The seeds have been used in the manufacture of shagreen (rawhide made from tough untanned animal skin).

The plant is said to have been used in Germany for fattening poultry. It was called 'fette henne' ('fat hen').

Due to the saponin content in the seeds, Good King Henry has been used traditionally by indigenous peoples to stun fish. They would place it into streams or lakes.

Moths, such as the Dark Spinach (Pelurga comitata), and the Plain Pug (Eupithecia simpliciata), often interact with Good King Henry.

Medieval medicinal uses of Good King Henry*

The leaves of Good King Henry were used to make a poultice or ointment. This helped to soothe, clean and heal chronic sores, wounds, boils and abscesses.

It was also used as a remedy for digestive problems, scurvy and gout. 

*As always, this isn't to be considered medical advice today. Please don't use any plants mentioned in these blogs as medicine without advice from a doctor.

Medieval herb garden blogs

Browse all blogs by our dedicated team of volunteer gardeners at Pontefract Castle. Discover a different 'Plant of the Week'.

More blogs

Subscribe to our newsletter

Sign up to our newsletters to get our latest updates, events and exhibitions sent straight to your inbox.