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Euphorbia lathyris - seeds

Euphorbia lathyris
Caper Spurge, Gopher Spurge, Mole Plant

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This Euphorbia, most often biennial, forms an upright stem, branched at its end, adorned with long, greenish-blue leaves with a white central line, arranged in pairs in a cross shape, horizontally. Its summer flowering consists of large, yellowish-green umbels. This "weed" which ensures its perenniality through self-seeding has a reputation as a "mole-chaser", probably due to its irritating latex. It is easy to grow in most regions.
Flower size
10 cm
Height at maturity
90 cm
Exposure
Sun, Partial shade
Annual / Perennial
Perennial
Germination time (days)
30 days
Sowing method
Direct sowing, Sowing under cover, Sowing under cover with heat
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Sowing period February to May, August to September
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Flowering time July to August
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Description

Euphorbia Lathyris, commonly known as Caper spurge or simply Spurge, is also called "mole plant" or "mole chaser". In gardening folklore, it is considered a natural repellent for these small mammals. Most often biennial, this plant forms a single upright stem, adorned with long blue-green leaves with a white median, arranged in a cross shape and horizontally around the stem. Its summer flowering consists of large acid-green umbels that are refreshingly vibrant. It was once widely found in gardens but is now sometimes considered a weed. It is very undemanding, hardy, and drought-resistant. It also has an unusual architectural quality that can be highlighted in a rock or contemporary garden: plant it in groups of 5 to 7 specimens for a stunning geometric effect!

Garden Spurge belongs to the Euphorbiaceae family. It is native to southern Europe (France, Italy, Greece) and China, and naturalised in many countries. It can be found in fallow land, embankments, and debris, not far from human settlements, as well as in gardens. This species grows for one or two years, blooms only once, and then dies. It is thought that the irritating latex that oozes from broken stems repels moles when placed in their burrows.

The Caper spurge is a herbaceous plant that develops a stiff, hollow, and sturdy stem, branching in its upper part when mature. It reaches an average height of 90 cm (up to 1.20 m in rich soil). This stem bears evergreen leaves in winter which are glabrous, narrow and linear, pointed at their tips, with a glaucous colour and a nearly white central line. They are arranged oppositely on the stem, and each pair of leaves forms a right angle with the pair located just below and just above. Seen from above, these leaves form overlapping crosses. The quite spectacular flowering takes place in summer, in July-August, after the stem branches in its upper part. The branches produce a large spherical umbel that bears numerous petal-less flowers, adorned with beautiful, bright yellow-green bracts and carried by bluish peduncles. After pollination by insects, the flowers produce fruits that explosively release the seeds, emitting a characteristic sound. The root system of this plant consists of a main taproot and a few secondary roots.

Like all euphorbias, this plant contains a sticky and toxic latex when broken. It can cause skin irritations (sap) and is toxic if ingested (applies to all parts of the plant).

Euphorbia lathyris is perfectly suited to wild, contemporary, natural, or rock gardens. Its uniqueness will complement the tall torch lilies of yellow, orange, or red kniphofias, the colourful leaves of phormiums, the blue flowers of forget-me-nots, and the architectural presence of yuccas. Planted in groups, it exhibits a sufficiently strong silhouette to stand out in a rock garden or along a path. Equally at home in modern gardens as in a rustic atmosphere, it blends well with anything, enhancing any colour with its acidic inflorescences. To make its flowering even brighter, simply pair it with the purple of irises and ornamental garlic. The combination with drought-tolerant grasses is particularly successful. You can use it to create soft and sinuous mass effects, structure flower beds, and contrast colours and leaf shapes.

Flowering

Flower colour yellow
Flowering time July to August
Inflorescence Cyme
Flower size 10 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Evergreen
Foliage colour green

Plant habit

Height at maturity 90 cm
Spread at maturity 25 cm
Growth rate fast

Safety measures

Potential risks Plant that can cause skin and mucous membrane reactions

Botanical data

Genus

Euphorbia

Species

lathyris

Family

Euphorbiaceae

Other common names

Caper Spurge, Gopher Spurge, Mole Plant

Botanical synonyms

Euphorbia lathyrus

Origin

Mediterranean

Planting and care

Sowing:

Sow the euphorbia in a tray indoors from February or outdoors in April-May on the surface on a well-drained, light but slightly moist seed compost. Simply cover with vermiculite or a thin layer of compost. The ideal temperature for germination is between 15 and 18 °C. Germination can be slow and irregular, taking from 2 weeks to several months. If your seeds do not germinate, place them in cold at 4°C for 3 months, then return them to warmth. Make sure the substrate always remains slightly moist. Transplant the seedlings when they are large enough to handle, into 8 cm pots. After a period of hardening to outdoor conditions, you can plant them in the ground with a spacing of 50 cm.

Another possibility: sow in late summer directly in place, in rockeries or flower beds, shallowly as they need light to germinate. Winter temperatures are beneficial for breaking seed dormancy. They will germinate in spring.

Cultivation:

Euphorbia lathyris is easily grown in any well-drained soil, preferably in full sun. The presence of limestone is not a problem and it is hardy. The ideal substrate should be loose, flexible and well-drained. Plant early in autumn or spring. This euphorbia tolerates summer drought perfectly. The plant grows for one or two years, flowers only once and then dies. It easily self-seeds in light soil if faded flowers are not removed. However, young self-sown plants are easy to pull out if necessary.

Cut the faded inflorescences around July if you want to avoid elf-seeding. This will make room for new shoots produced by the crown. Seedlins are easily pulled out.

Sowing period

Sowing period February to May, August to September
Sowing method Direct sowing, Sowing under cover, Sowing under cover with heat
Germination time (days) 30 days

Intended location

Suitable for Meadow, Rockery
Type of use Border, Edge of border, Slope
Hardiness Hardy down to -18°C (USDA zone 7a) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil moisture Dry soil, well-draining

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