Another
Buddleja macrostachya

30^th September 2026

This ons is a full sibling of the plant I showed last autumn on the 2025 Diary Page . They were grown from seeds kindly given to me by the nursey A THOUSAND FLOWERS in the USA. I am fairly sure the plant is not a hybrid. The individual flowers are slightly finer than others of the species; otherwise they conform to the normal pattern.

The inflorescence is upright, suggesting a 'Type 2' B. macrostachya, as oppposed to a 'Type 1' with pendulous flowers. The flowering time is between the summer flowering 'Type 1' and the late autumn flowering 'Type 2'. B. macrostachya doesn't divide neatly into two discrete types, so I am unsuprised to find an 'intermediate' form.

The plant itself is quite vigorous, already more than two metres tall even in a pot. The leaves are large and typical for B. macrostachya. The new growth green stems are conspicuouly winged. Many of this species are not, although some do have these winged stems more typical of the closely related , for example B. macrostachya SBEC360.

Hardiness is as yet untested, although I hope to plant one of the siblings outside in the near future. Ex situ bred plants can often show increased resilience compared to their parent(s), so I am optimistic it will flourish once planted in the ground.

This B. macrostachya has winged stems
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B. macrostachya grown fron ex situ raised seeds.
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Another Generation of
Buddleja macrostachya

25^th August 2026

Now the weather has finally settled down, the plants are getting back to normal and there are some late-flowering forms that have avoided the worst of the heat. Each year I grow a few seedlings and look forward to seeing the new flowers, hoping for new forms or colours. I do have a habit of collecting open-pollinated seeds from some of the species Buddlejas in the hope of raising something unexpected, a unique hybrid possibly.

This seedling was raised from seeds taken from my pink B. macrostachya, which was itself ex situ bred by me, and is a summer-flowering type; its flowers were open-pollinated, so I cannot be certain of the pollen parent of the new seedling, whether it was the same species or not, or if the seeds were the result of self-pollination.

These large Buddleja can take several years to flower, but this one had flowered in only its second year. The flower is practically identical to the parent plant, except perhaps the colour is a touch more lilac-mauve than pink and the scent weaker. The individual flowers have the typical features of B, macrostachya - tomentum on the outer surface of the longish corolla tube, stamens placed well above the stigma in the hairy throat - and the morphology doesn't look to be the result of any hybridisation. There are others of the same species as the pink B. macrostachya on the site, siblings and their reciprocals, but my money is on this seedlng being the result of self-pollination.

Plants bred and selected locally can be more suited to the local weather conditions compared to the parents, and indeed my pink B. macrostachya shows improved hardiness over its parents. I am wondering whether this second generation will produce a plant which proves to be hardier still, or whether there is a limit to how far selective breeding can take a species of marginal hardiness towards a fully hardy specimen.

A seedling of my pink B. macrostachya
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A Very Difficult Year

19^th August 2026

The weather has been unprecedented. I've lost count of the number of heatwaves - three consecutive days of temperatures over 30 Celsius - since May. Five or possibly six periods of extreme heat. There has also been a drought, with practically no rain in the summer months. Asian Buddlejas are mountain species, and are not adapted to heat nor to a prolonged summer drought. In fact, several depend on the summer monsoon in their native habitat.

Many of my plants look bedraggled and wilting. The flowers are small and can become bleached at higher temperatures. I have had one plant appear to die from the stress, a B. limitanea hybrid of my own, but I think it might regenerate from the roots when th rain comes. Plants in pots can be moved into shade, but for those planted out on my plot there is no respite from the burning sun and lack of rain.

The worst of the heat seems to over for now, with some rain in the forecast. I'm hoping this is an exceptional summer and that it is not the pattern for English summers in the future. If it proves to be the new climate norm, then I'm sorry to say my Buddleja collection is unsustainable.

So, I've little to show for this summer. I consider it an achievement just to have kept so much alive. With any luck, and a little rain, there will be more to show going into the autumn.

This plant could not stand the repeated heatwaves
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Buddleja davidii
'First Love'?

7^th July 2026

Earlier this year I bought a new Buddleja called 'First Love'. Now it has flowered, I can see it is almost certainly a cultivar called 'Magda's Gold Knight', which has Plant Breeders Rights (PBR/PVR) - in other words, it cannot be propagated and sold without a licence, and paying a small royalty.

It is my opinion this is a bogus name, used only to circumvent the licence. That aside, it's a great combo: dark purple 'Black Knight' flowers against yellow-vaiegated foliage.

'First Love' could be a bogus name
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Buddleja globosa
'Not Neville'

24^th June 2026

Two years ago I named a B. globosa I'd raised 'Neville' (see the flowers here), having thought it was a male plant. I was wrong. Now it it unabiguous - 'Neville' (as was) has formed seed pods from every flower and I cannot see any functional stamens when it's flowerng. This plant is female, or has pistillate flowers to be precise. So, now I need a different name.

Buddleja globsa 'Neville' seed pods confirm this plant is female.
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Buddleja salviifolia
Seedlings

3^rd June 2026

Last year I was able to cross the blue form of B. salviifolia with pollen from the white form - see here for details of the parents. The two forms are very different and don't at first sight look like the same species. Moreover, the white form flowers a month earlier (late March onwards) and pollen isn't always available once the blue form finally opens. I was lucky last year when they almost conincided and carried out hand-pollination to be certain of the cross. A very large number of seeds were produced from a single inflorescence and, when sown this January, had a very high germination rate.

Seedling leaves can be misleading, but at the moment it looks like the white form is dominant, at least with regards to the leaf-type. It takes a few years for this species to flower - what colour will the flowers be? Will white again be dominant or will there be a range of shades? Only time will tell.

These Buddleja salviifolia seedlings appear to be taking after the pollen parent
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Buddleja davidii
'First Love'

5^th May 2026

There are a number of variegated Buddleja cultivars, most of which are B. davidii. This is a new one, going by the name of 'First Love' (not a name I would have chosen). The foliage is very attractive, with wide pale yellow margins to the leaves. 'Harlequin', in contrast, has creamy-white margins, and 'Santana' has leaf margins of a much deeper yellow. Both of these cultivars are sports of 'Royal Red' with maroon flowers.

'First Love' promises deep blue-purple flowers as an alternative. I hope to be able to compare it to another newish variegated form of 'Black Knight' (deep purple flowers) from the Netherlands called 'Magda's Gold Knight', which I also hope to grow this year.

I know only a little of the origin of 'First Love': it was raised in Northwich, Cheshire and has had a only a limited release this spring.

A new variegated Buddleja davidii called 'First Love'
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Buddleja salviifolia

1^st April 2026

I've been growing this Buddleja salviifolia plant, grown from South African seed, for several years without it ever producing any flowers, whereas two of its siblings did flower some time back -- one lilac and one pale violet (see here). After a long wait, its flowers have finally made an appearance this spring and they've proved rather disappointing, certainly inferior to both siblings.

The inflorescences is small and has relatively few individual flowers compared to others of the species. And each individual pale lilac flower is tiny, again smaller than usual, only 3-4mm diameter. Their size is similar to another South African species, B. auriculata, although I'm positive this is not a hybrid.

This Buddleja salviifolia has very tiny flowers
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From the Archives
Part Two

13^th January 2026

Buddleja davidii

I thought it was time to update my Buddleja davidii page. I have found out so much more since the original page was written and in recent weeks I have been again delving into the archives. The new page has much more about the history of the species in cultivation, which was often called Buddleia variabilis back in the day, and details about the early cultivars from before WW2.

As well as the main page, I wanted to share many of the references from the early 20th century I used to compile the page. So there are now two additional pages:
B. davidii species references, showing the first publications for the species, some with botanical illustrations;
B. davidii references for the varieties, mostly about the origins of the first types grown in gardens such as B. davidii var. veitchiana.

'Fortune' is an old cultivar, bred by Paul Schmidt of Youngstown, Ohio (U.S.A.) sometime prior to 1935, and was originally marketed as a cut flower. One of the earliest to be given a cultivar name, rather than be called a 'variety', it was the first Buddleja to be granted a US plant patent. The patent application tells us something interesting - this is a hybrid plant that has some contribution from B. asiatica, a species that is considered very tender. 'Fortune' now looks nothing special with its rather mundane violet-lilac flowers when compared to more modern cultivars with their bigger and vivid-coloured inflorescences. At some point, it was exported to the UK and, surprisingly, is still available from some specialist nurseries.

Publicity for 'Fortune from the 1940s
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From the Archives

1^st January 2026

Buddleja colvilei

In the winter, there's not much to write about hardy Buddlejas and this gives you the opportunity to trawl through some old publications and look into the history of a few plants. Looking back into these journals can be instructive and may even offer some clues to the mysteries around the origins of the plants we still grow today.

Buddleja colvilei was introduced into gardens earlier than B. davidii, but its appeal was limited by its needing space and being shy to flower in all but the most sheltered positions. The climate of Britain and Ireland has warmed since the 19th century and now the species will flower more reliably in many gardens.

The first report of the species flowering in Europe was in 1893, at a garden in County Cork, Ireland; the plant is described by the author, a Mr. Gumbleton of Belgrove, as having pale rose-coloured flowers with a white throat. The illustration takes some artistic licence, with the outer corolla much too flattened and the white extending into the petals in a way I've never seen in a real plant.

I grow a pink form of the species, which corresponds to his description. It's now impossible to confirm, but I'd like to think this pink-form of B. colvilei is the same plant as that grown by Mr Gumbleton in his Belgrove garden back in the 1890s. In honour of this piece of Buddleja history, I think it would appropriate to rename it 'Belgrove Pink'.

The 19th century articles by Gumbleton, Hooker and others can be read here, including all the colour illustrations. Unfortunately, Mr Gumbleton incorrectly spelt the name "colvillei" with a double-l, a mistake then repeated in some later articles.

Gumbleton's Illustration of 1893
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Buddleja × ladhamii
'Elstead Hybrid'

The origin of the B. × weyeriana hybrids is perhaps more complex than assumed. In addition to the well-known van de Weyer report, it would seem from correspondence The Gardeners' Chronicle of 1938 Ernest Ladhams of Elstead in Surrey was also making the same crosses at about the same time. To cut a long story short, among all the spurious names for these F2 hybrids of B. davidii and B. globosa, there really is (or was) a B. × ladhamii 'Elstead Hybrid' (perhaps that should more correctly be ladhamsii with an s?), a culitvar genetically distinct from the plants of Mr van de Weyer.

The evidence from pre-WW2 journals suggests the plant we now call B. × weyeriana 'Moonlight' ('Moonlight Pale') might in fact be B. × ladhamii 'Elstead Hybrid'.

The full story can be found here.

Is the plant we call 'Moonlight' actually
B. × ladhamii 'Elstead Hybrid'?
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