Berkheya purpurea, an unusual addition to the flower border

I have first seen Berkheya purpurea flowering in a botanical garden in Germany. I really liked the thistle-like leaves and the large pale-pink daisy flowers but it took many years until I saw it again, growing in the Merton Borders in Oxford Botanical Gardens. By then I had already acquired my first allotment so could try growing this fascinating plant myself.

Berkheya is very easy to grow from seed, you just have to sow the seeds in a good seed compost, keep them warm and moist and in good light. After about 2 weeks the first seedlings appear. They grow quickly and can soon be pricked out into individual plugs and later into 9 cm pots. I plant them out on the allotment when the roots start to grow through the bottom holes.  

Berkheya purpurea flowering in the Merton Borders in Oxford Botanical Gardens

 

The plants like to grow in well-drained soil (especially important in winter) which does not dry out too much in summer. Sunshine is essential and they don`t like to be crowded by other plants, a place among other low-growing perennials or at the front of a border would be ideal.

Berkheya purpurea has large prickly leaves which form a low-growing rosette which stays green in a mild winter. Don`t be alarmed when the leaves turn brown in a hard winter, the plant will grow back from its base in spring. The first flowers appear in June and carry on until autumn, this year I had the last flowers in October. The daisy flowers are very large, up to 10 cm in diameter and pale-pink in colour. They attract a lot of pollinators such as bumblebees, solitary bees and hoverflies.

Tree bumblebee, honeybee and solitary bee sharing a flower

Another tree bumblebee

Common carder bumblebee collecting nectar

South Africa is the home of Berkheya purpurea, the plants grow naturally along streams and on steep, grassy mountains slopes 1525 to 3050 m above sea level, from the mountains in the Eastern Cape to the Drakensberg in KwaZulu-Natal, Lesotho and the border of the Free State. Snow and frost are common at a higher altitude and summer can be quite wet. This might be one of the reasons that Berkheya is quite happy to grow in the UK.

Frosted Berkheya leaves, still green in December

The seed heads look pretty as well

There are 75 species in the genus, about 71 species are indigenous to South Africa, and most have thistle-like leaves. Jelitto Perennial Seed offers a selection of different species including Berkheya purpurea. I would also like to try Berkheya cirsiifolia, which has white flowers, so watch this space if I succeed. A few years ago I had one plant of Berkheya multijuga (with yellow flowers) which survived a few years, but unfortunately rotted away in a wet spring. Berkheya purpurea does seem to be a lot more forgivable and I have not lost a plant so far. 

  

I hope I could spark your interest in growing this pretty plant; I would love to hear from you if you decide to give it a go next year.

Autumn on the wildlife allotment

The year has gone really quickly, summer is just a dream now and winter is coming. But so far we did not have any prolonged cold weather here. We had some very early frosts in September which blackened the Dahlias but surprisingly did not do much to the Cosmos which were still standing in October.

There were quite a lot of lovely warm days, a reminiscence of summer. Many perennials kept on flowering well into late autumn such as the autumn asters and Bidens heterophyllum. Others which had suffered in the heatwave started to flower again such as Astrantia major. But autumn was still quite dry and the few rainy days did not do much to relieve the drought.

Dahlia merckii flowering on the allotment

Dahlia merckii, Verbena bonariensis and seed heads of Echinacea purpurea

Kniphofia 'Mango Popsicle'

Aster pyrenaeus 'Lutetia' flowering in September

The allotment on a sunny morning in September

On cold and sunny mornings I liked to get up early to photograph the seed heads and grasses on the allotment which looked beautiful covered in dew. I especially love the grass Eragrostis elliottii which has a lightness and airiness, not found in many other grasses.

The cloud-like seed heads of Eragrostis elliottii look beautiful on a cold morning in autumn

Calamagrostis brachytricha, also called Diamond grass, sparkling in the early morning sunshine

Spiders like the seed heads of Inula magnificum and Veronicastrum virginicum

Bees were quite active until October, especially the Common carder bumblebee (Bombus pascuorum) was quite abundant.  I have even seen a solitary bee, the Ashy Mining Bee (Andrena cineraria), which normally has just one generation which is active in spring. You normally don`t see it in late autumn. But this year there were several bees flying around on my allotment, visiting flowers. They must have been confused by the weird weather we had this year.

Common carder bumblebee on a Berkheya purpurea flower

Another Common carder bee visiting a Cosmos flower

A Drone fly (a  type of hoverfly) drinking nectar from aster flowers

I was very surprised to find some Ashy mining bees on my allotment in October

I was glad the allotment hedgehog survived the summer heatwave, partly probably thanks to the ponds on my allotment which offered much needed fresh water. The foxes were frequently seen as well, always looking busy. For a long time I had not seen the little wood mice which used to live on my allotment and I already feared that the cats might have finished them off. But luckily they are alive and well, happily residing in one of my compost heaps.

Here is a little video of some of he nocturnal wildlife on my allotment including the hedgehog, a little wood mouse and foxes:

Below are some more pictures from the allotment:

Seed heads and grasses

Cosmos is still flowering in October

Seed heads of Echinacea purpurea, Verbena hastata, Alliums and grasses

Panicum virgatum, also called switchgrass, looks very pretty in autumn

Bidens heterophyllum is still flowering in October

Annual Coreopsis with the grass Hakonechloa macra in the background

Kniphofia caulescens flowering in September

Aster flower (Symphyotrichum novi-belgii) covered in dew

Astrantia major started flowering again in September and is looking very pretty after a frosty night