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Jeremy Bartlett's LET IT GROW blog

The wonder of plants and fungi.

Jeremy Bartlett's Let It Grow Blog
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"People from a planet without flowers would think we must be mad with joy the whole time to have such things about us." - Iris Murdoch

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Oxeye Daisy, Leucanthemum vulgare

Jeremy Bartlett's LET IT GROW blog Posted on 29 January, 2018 by Jeremy Bartlett2 February, 2018

“The nodding oxeye bends before the wind” – John Clare, “The Fear of Flowers“.

Oxeye Daisy

Oxeye Daisy flower with Mint Moth, Pyrausta aurata, and Thick-thighed Beetle, Oedemera nobilis.

Spring starts with the white flowers of Snowdrops and the theme continues throughout spring and summer with a series of white flowers, including Blackthorn blossom, Wild Garlic, Garlic Mustard, Cow Parsley, Hawthorn, Hogweed and Wild Carrot.

In late May and June in our wildflower meadow, it is the turn of the Oxeye Daisy, Leucanthemum vulgare. This member of the Daisy family, the Asteraceae, will sometimes continue to flower into September. It can be found throughout the British Isles, up to 845 metres (nearly 2800 feet) above sea level, on Great Dun Fell in Cumbria. Further afield, it is native to temperate parts of Europe and Asia.

The Oxeye Daisy (sometimes spelt Ox-eye Daisy) is like a much bigger version of the Common Daisy (Bellis perennis) that flowers on lawns and it grows to 40 centimetres (16 inches) tall. Each flower head can be five to six centimetres (2 – 2.4 inches) across and consists of lots of yellow disc florets in the centre and about twenty white ray florets around the outside. The leaves are dark green and toothed, and the lower ones, which stay green in winter, have a distinctive spoon shape and long leaf stalks. Further up the stem, they are thin and jagged.

Oxeye Daisies like to grow in grassy places, such as in meadows, pastures and waste ground, and on dunes and cliffs. They will quickly colonise open ground and can sometimes be seen on road verges and by railway lines. Oxeye Daisies can persist in shorter grass without flowering and I remember when, at our old house, next door’s lawn was allowed to grow long one summer and became a meadow of Oxeye Daisies.

Unless Oxeye Daisies can spread by seed they will die out if there is too much competition from other species. Grazing, mowing or low soil fertility will allow them to persist. They are “particularly rampant in fertile soil“.  In our garden, a clump I planted in the wildflower meadow when I established it in late 2013 is doing very well and has seeded into other parts of the meadow.

Oxeye daisies like a sunny spot and neutral to basic soils that aren’t too wet. This year I am going to grow some in pots in the front garden, where I hope they will seed into cracks between paving slabs in the drive. Even if they don’t, they should form a longer-lived version of the wild flowers in a pot I grow every year.

Oxeye Daisies are particularly good for wildlife and in our garden the flowers have attracted a range of insects from moths and flies to beetles and solitary bees, often with two or more species on the same flower at once, as in the photo above. Along with Wild Carrot, Oxeye Daisies are one of the best plants you can grow to attract insects to your garden.

Other English names for Oxeye Daisies include Dog Daisy, Moon Daisy, Horse Daisy, Moonpenny and Marguerite. The “Moon” names probably arise from the way that Oxeye Daisy flowers seem to glow in the twilight on midsummer evenings. Leucanthemum comes from the ancient Greek leucos (white) and anthos (flower). Other members of the genus include Leucanthemum x superbum, the Shasta Daisy, which is like a supersized Oxeye Daisy and is often grown as a garden flower. It is better behaved but I prefer the subtlety of Leucanthemum vulgare. The name “Marguerite” is also used for the daisy Argyranthemum frutescens.

Oxeye Daisies have been introduced to North America, Australia and New Zealand, and in places are an invasive weed. Leucanthemum vulgare is listed in the Invasive Plant Atlas of the United States. The influence of cattle in their spread is rather interesting. If cattle pastures are grazed continuously with a low density of animals, cattle will avoid Oxeye Daisies because don’t really like the taste. They will eat the plants they prefer, and this reduces competition and allows Oxeye Daisies to spread. Around 40% of any Oxeye Daisy seeds that cattle do eat remain viable after passing through the gut, so can be spread to new areas.

I haven’t tried eating Oxeye Daisies yet but the Plants For a Future website tells us that the young leaves can be eaten either raw or cooked. They are “rather pungent [and] should be used sparingly or mixed with other salad plants“. In his book “Around The World In 80 Plants“, Stephen Barstow lists Leucanthemum vulgare as one of 56 species he added to a “tasty” calzone (filled pizza) in June 2010. The roots can be eaten raw as well, and the Plants For a Future website also lists a variety of medicinal uses for the plant. The Raw Edible Plants website says that the whole flower tastes good but numbs the tongue, and that the buds can be used as a substitute for capers.

The Eden Project website has a recipe for Tempura Battered Oxeye Daisies and Wild Food Girl, based in Colorado in the United States, says that “Ox-eye Daisies Are Good Eatin’” and has used them in salads and stir-frys and on tacos. She says they “have a strong and unique, somewhat sweet flavor that I like“. On that recommendation, I think I will give them a try.

If you are in a part of the world where they aren’t an invasive weed and want to grow your own Oxeye Daisies, they are easy to grow from seed in spring or autumn and here in the UK I recommend Emorsgate Seeds as a source for these or other wild flower seeds. Naturescape sell Leucanthemum vulgare as plant plugs.

Once you have some plants and allow them to seed you should never be without them. Each flower head can set up to 200 seeds but seedlings are easy to weed out if you don’t want them.

On our allotment, the plants seed into open soil and, when they grow in the wrong place, I try to move them to where I want them. Now is a good time to do this; they are easy to transplant and will reward you with their lovely flowers and accompanying insect life if you spare them.

Wasp Beetle, Clytus arietis

Wasp Beetle, Clytus arietis, on Oxeye Daisy. (It is a type of Longhorn Beetle that mimics wasps but is completely harmless.)

Posted in Edible, Foraging, Ornamental | Tagged Dog Daisy, Horse Daisy, Leucanthemum vulgare, Marguerite, Moon Daisy, Moonpenny, Ox-eye Daisy, Oxeye Daisy

Manuka, Leptospermum scoparium

Jeremy Bartlett's LET IT GROW blog Posted on 15 January, 2018 by Jeremy Bartlett29 January, 2018
Leptospermum scoparium

Manuka, Leptospermum scoparium, with solitary wasp Sapyga quinquepunctata (May 2017).

Yesterday I walked around the garden, noting what was in flower. In short, not much: stalwarts like Erysimum ‘Bowles’ Mauve’, Erigeron karvinskianus, Winter Heliotrope, Fuchsia microphylla, Coronilla, daisies in the lawn and some trailing Lobelia plants in a sheltered place that have escaped the frost. But, by our south-facing living room wall, our Leptospermum scoparium (Manuka or New Zealand Tea Tree) has started to flower. It will continue to flower into spring, reaching its peak in late May and June.

Leptospermum scoparium is native to Australia and New Zealand, and is a member of the family Myrtaceae, along with the Mediterranean shrub Common Myrtle, Myrtus communis, and well-known Australian plants such as the gum trees, Eucalyptus, and bottlebrushes, Callistemon. The family also contains several spices: the Clove, Syzygium aromaticum, a native of Indonesia, and the Guava, Psidium guajava,  and Allspice, Pimenta dioica, both from Southern and Central America. Bog Myrtle, Myrica gale, a British native, is not a relative – it is in the family Myricaceae.

Leptospermum scoparium is thought to have originated in Australia and then spread to New Zealand, where it is now much commoner. It is a shrub or small tree, typically forming scrub 2 – 5 metres (7 – 16 feet) tall, but capable of growing up to 15 metres (nearly fifty feet). It has small, prickly leaves and pink or white flowers with five petals. It can form dense scrub and is often one of the first species to regenerate on land that has been cleared. It was first grown in the British Isles in 1772 and escaped into the wild on Tresco (Isles of Scilly) in 1935.

I bought my Leptospermum scoparium from Dover Farm Nurseries in Briston in North Norfolk in the spring of 2015. The plant was covered in a mass of flowers and it was an impulse buy. I soon found a space for it underneath the living room window, in a sheltered and sunny spot. I added homemade compost to the poor, sandy and rubbly soil before I planted it and it turns out I had chosen the ideal conditions for it. Leptospermum is hardy to about -5 degrees Celsius (USDA Hardiness Zones 9 -10, equivalent to RHS Hardiness Rating H2 – H3). It seems very happy next to the house, but I remember seeing lots of dead Leptospermum and Callistemon plants after the cold winters of 2009 – 2010 and 2010 – 2011, so I am aware I may have to cover it in severe frosts. In a colder climate, Leptospermum can be grown in a pot, in ericaceous compost. Avoid peat because of the environmental damage its extraction causes – I use alternatives such as wool-based composts.

There are lots of cultivars of Leptospermum, and L. scoparium is not the only species grown. Flower colour ranges from white to deep red-pink and there are dwarf forms as well (L. scoparium nanum). Burncoose Nurseries has photographs and descriptions of many of these. The variety ‘Red Damask‘ is a bit hardier, and is given RHS hardiness rating H4 (hardy to -10 degrees Celsius), but its flowers are partly double and I don’t particularly like them. My own cultivar was labelled ‘Lambertii‘.

Leptospermum means “thin leaves”. Manuka is the Maori name for Leptospermum scoparium. Other names include New Zealand Tea-tree, but tea tree oil comes from a different species, the Australian plant Melaleuca alternifolia, also in the Myrtaceae.

Honeybees make Manuka honey from the nectar of Leptospermum scoparium. The honey is claimed to have antibacterial properties and is a fashionable health food. It has a very distinctive taste, described as “florid, rich and complex“. I like the flavour, though whether the honey is quite worth the high price is debatable. There have been cases of adulteration of Manuka honey and beehives in New Zealand have been damaged, presumably by competitors. News of honey wars have been reported in British newspapers in recent years and there is an ongoing dispute between New Zealand and Australia over the trade marking of the name “Manuka”.

Meanwhile, in the UK, the Tregothnan Estate in Cornwall is growing Manuka and uses the leaves to make a type of tea. (Manuka tea is described as “refreshing” by the Plants For A Future website, though the leaves need to infuse longer than ordinary tea. On the Camper Mate website Adam Hutchinson recorded his experience of making some from fresh leaves, but “sadly, it tasted terrible”.)

Tregothan also produces Manuka honey on a very small scale, but with just twenty 420g jars from the 2016 season, selling at £225 each I don’t think this is any threat to Australian and New Zealand honey producers.

In our own garden, honeybees and bumblebees are attracted to the flowers, along with solitary bees such as the Short-horned Yellow-face Bee, Hylaeus brevicornis and the solitary wasp Sapyga quinquepunctata. The latter more normally visits thyme flowers, and is on the lookout for its prey, Mason Bees (genus Osmia).

Posted in General, Ornamental | Tagged Leptospermum scoparium, Manuka, New Zealand Tea-tree

Bloody Crane’s-bill, Geranium sanguineum

Jeremy Bartlett's LET IT GROW blog Posted on 6 January, 2018 by Jeremy Bartlett12 May, 2023
Geranium sanguineum

Bloody Crane’s-bill, Geranium sanguineum, and Meadowsweet, Filipendula ulmaria, growing on a road verge in Cumbria.

It is six years since I started this blog, and during that time I haven’t written about any of my favourite groups of plants, the crane’s-bills (genus Geranium, in the family Geraniaceae). It is time I made amends.

We have about a dozen species of Geranium in our garden, including cultivated varieties and “weeds”, like Herb Robert (Geranium robertianum) and Shining Crane’s-bill (Geranium lucidum), that I allow to grow and self-seed, pulling out any that are in the wrong place. Bloody Crane’s-bill, Geranium sanguineum, is one of my favourite crane’s-bills.

I first encountered Bloody Crane’s-bill in The Burren in Ireland, where it grows in gaps (grikes) in limestone pavements. Then, when we bought our first house in Norwich, it was growing in the back garden, and we moved some to our current garden when we moved here nearly five years ago. Since then I have seen Bloody Crane’s-bill on low cliffs along the Northumberland coast and on roadsides in Cumbria. My experiences of the plant tie in with the description of the plant’s distribution in the Online Atlas of the British and Irish Flora: it can be found in grassland, rocky woodlands and on coastal cliffs, where it prefers base-rich soils, but it can often be found as a garden escape. Bloody Crane’s-bill also grows in other parts of Europe and Asia, as far north as southern Finland. And in America – according to Missouri Botanical Garden, Geranium sanguineum is “perhaps the most common species of geranium grown in the U.S. today”.

Bloody Crane’s-bill is a clump forming perennial with deeply divided palmate leaves. The flowers have five overlapping petals and appear from May to August, with their peak in June and July. In the commonest form of the plant these are magenta, ageing to a purplish-blue. According to Richard Mabey (Flora Britannica p272), the name “bloody” and the specific name “sanguineum“, which means the same, originally came from the colour of the plant’s stalk-joints. The flower stalks, seed capsules and leaves also turn red in autumn. The First Nature website says that it is the colour of the stalks and seed capsules that give rise to the name, while Wikipedia suggests that it may be the autumn leaf colour.  The specific name “Geranium” and the English name “Crane’s-bill” (also written “Cranesbill”) both refer to the shape of the plant’s seed capsule.

When I selected plants for Grapes Hill Community Garden in 2011, I ordered several Geranium sanguineum. I was a little surprised when these produced flowers with crinkled pink petals, rather than magenta. I discovered we had bought Geranium sanguineum ‘Striatum’, Striped Bloody Crane’s-bill. It was actually a pleasant surprise: it is a very pretty flower. I now grow both forms in our back garden. I hope to visit Walney Island in Cumbria one day to see G. sanguineum ‘Striatum’ growing in the wild. (Its older name of Geranium sanguineum var. lancastrense is sometimes used by gardeners and refers to its place of origin – before boundary changes in 1974 Walney Island was part of Lancashire. 

Nurseries such as The Plantsman’s Preference in South Norfolk stock many other varieties. I have also tried G. sanguineum ‘Max Frei’, which has magenta flowers but is a more compact plant, suited to banks and rockeries.

Geranium sanguineum is a superb garden plant. It is good ground cover but it isn’t invasive. Clumps can be split every few years and new plants can also be grown from seed. The RHS and Gardeners’ World websites give advice to growers. I have grown Bloody Crane’s-bill in semi-shade and sunshine, on loamy soil and sandy loam. The ideal growing medium is “moist but well drained“, if such a soil exists.

For more photographs of Bloody Crane’s-bill, I recommend the Wildflower Finder and Finnish NatureGate websites.

One very good reason for growing Geranium sanguineum is its wildlife value, as the flowers are attractive to a range of solitary bees. In our garden last summer the flowers were visited by several species, including the Patchwork Leafcutter Bee (Megachile centuncularis), the White-jawed Yellow-face Bee (Hylaeus confusus), the Large Narcissus Hoverfly Merodon equestris, the Blue Mason-bee (Osmia caerulescens) and Small Scissor Bee (Chelostoma campanularum).

Chelostoma campanularum

Small Scissor Bee, Chelostoma campanularum, on Geranium sanguineum flower. June 2017.

Although Bloody Crane’s-bill isn’t thought to be poisonous, it isn’t considered to be edible either. The Plants For A Future website doesn’t list it but it has an entry for its relative Meadow Crane’s-bill, Geranium pratense. Under “edible uses” it says “none known”.

Posted in Ornamental | Tagged Bloody Crane's-bill, Bloody Cranesbill, crane's-bill, Geranium sanguineum

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Thirty latest posts

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