spring – Charlton and Blackheath Amateur Horticultural Society

Plant of the Month: Camellia (April 2026)

It really is a privilege to be invited into other people’s gardens, where the host is allowing us to peek into their private spaces, their secluded oasis and, we, the invitees, do feel very honoured on such an occasion. We see their tastes, their flair, their artistry of everything that make their garden special, thus revealing a little of themselves in the process.

Some are lucky enough to inherit established plants and Juli F is one of those gardeners who embraced her south-facing courtyard garden and the already mature crimson-flowered Camellia that came with it.

Pat’s 10 jobs for April 2026

1. Cut back those shrubby Salvias now if you haven’t already done so, both in the ground and in pots. Cut just above a shoot and they will grow away fast, but listen out for forecast of frost.

Cut back shrubby Salvia to a leaf node — Cut back shrubby Salvia, deter weeds (and possibly molluscs) with a gravel mulch,
and support your taller plants

Protect slug-magnets with grit — Cut back shrubby Salvia, deter weeds (and possibly molluscs) with a gravel mulch,
and support your taller plants

2. Some bulbs are now over so make sure to deadhead and then leave the foliage to die back naturally, and give them a good feed to build up the bulbs for next year.

Plant(s) of the Month: The Blues (March 2026)

My garden has suddenly come alive with spring colour, mainly yellow, mauve and blue flowers, but I’ve had to work at it: the result being some gorgeously blue-flowering plants purchased (as a contrast to the in-situ yellows) for growing in containers. They have worked their magic, basking in the sunshine and enticing me into the garden with their beauty and my admiration!

This year, I decided, firstly, to recreate my spring ‘blue garden’ in a galvanised planter, first digging out unwanted material. I chose blue flowering plants with different shapes and sizes of flowers for harmony and these are the varieties I planted (including a purple Viola and Agapanthus to give depth to the arrangement):

Veronica umbrosa ‘Georgia Blue’ (alpine speedwell)
A enchanting little ground cover perennial, preferring full sun, if possible, and flowering during the spring months.

March 2026 Meeting and Show Table

The March 2026 meeting had an energetic, spring-like atmosphere, with great attendance from members old and new as well as a number of guests. Thanks to all who took the opportunity to renew their membership for the year. We welcomed Lynne Moore of Moore & Moore Plants, who gave an inspiring and informative talk on plants for shade.

Everyone enjoyed refreshments, took part in the raffle, bought plants and seeds, collected their potato for the autumn potato growing competition and, of course, there was the regular Show Table. And what a lovely display there was this month – thanks to all who brought in their joyful and interesting plants and flowers:

Spring Show 2026 – classes to enter

The CABAHS Spring Show will take place on Monday 20 April 2026 and classes will be judged by John Hughes. Here’s a reminder of last year’s efforts!

Getting the 2025 CABAHS Spring Show set up and ready for judging — Spring Show 2025

Some of the 18 entries for Class 13: Narcissus 'Pipit' CABAHS Spring Show 2025 — Spring Show 2025

The classes you can enter this year are shown below, please have a go at as many as you like!

Pat’s 10 jobs for March 2026

1. Time to cut back Buddleja davidii hard… don’t be timid, take it right back to 40cm to a pair of buds. If you want a taller plant make the cuts higher up the stem. It will grow back in no time. The prunings make good hardwood cuttings and root easily straight in the ground.

Buddleja davidii in need of a hard prune — *Buddlejas* before and after a hard prune (not the same plant!)

Buddleja davidii after a fairly hard prune - already developing new shoots! — *Buddlejas* before and after a hard prune (not the same plant!)

2. You can pot up Dahlia tubers now by placing in pots or trays of peat-free compost in a frost-free place, and water once with no need to water again until shoots appear. Make sure the tubers are firm with no sign of rot.

What to look out for in the Old Pond Garden: March 2026

We hope you enjoy a spring walk around the walled gardens at Charlton House! Look out for:

Daffodil (Narcissus ‘Elka’)

Narcissus 'Elke' in the Peace Garden at Charlton House

A fragrant, small and early-flowering daffodil, you can spot Narcissus ‘Elka’ spreading gently in the Peace Garden. It has pale petals and a creamy yellow trumpet. The name ‘Elka’ comes from a combination of the names of two ‘lady daffodil growers’: Elizabeth and Kate.

Wood spurge (Euphorbia amygdaloides var. robbiae)

Euphorbia amygdaloides var. robbiae (wood spurge / Mrs Robb's Bonnet) in the Old Pond Garden, Charlton House, March 2024

Wood spurge is in the Euphorbia family, so take care! If the stems are broken, they gush with a thick milky latex substance that can cause irritation. They are handsome perennial plants, shade loving, with zingy lime-green flowers in late Spring and rosettes of glossy dark green leaves. Another name for this plant is ‘Mrs Robb’s Bonnet’ – we would like to see the hat that inspired that name!

Plant of the Month: Pittosporum tobira ‘Neige du Mont Ventoux’ (May 2025)

This variegated Japanese Pittosporum — P. tobira ‘Neige du Mont Ventoux’ — is a lovely addition to any garden, and particularly courtyard gardens, where space is at a premium, as it is the perfect specimen for growing in a container.

It was at a rare plant fair in Kent many years ago when I spotted this very appealing shrub. It was “twinkling” at me so, naturally, I found I just could not resist it and brought it home! Because of its branched structure, it was placed in a terracotta container and there it has remained, contented, to this day. I hadn’t realised at the time though, that this variety is very suitable for a container, as its height and width is generally no more than one metre at maturity.

May 2025 Meeting and Show Table

There was a great turnout for the CABAHS May meeting, even after the exertions of the previous day’s Plant Sale! A small but beautiful range of items on the Show Table, from a cornucopia of Spring flowers to a single rose and a cactus. Congratulations to Kathy for winning this month’s ‘Best on the Table’ prize with a vase of Salvia, Cerinthe, Teucrium, Hesperis, Centranthus, Luzula and chives.

Pat’s 10 jobs for May 2025

1. Border irises are really doing their thing now and the show can be brief but make sure to keep the soil around their roots free of weeds so their rhizomes can bake a bit in the sun.

2. Time to Chelsea chop your tall perennials to stop them flopping later or to extend flowering. Good candidates are Phlox, Penstemon, Helianthus, Sedum/Hylotelephium – and I include vigorous Clematis too. You can either do the whole plant at once or just some stems to extend flowering, although it may result in smaller flowers.

3. Deadhead displays of pot plants like Violas to keep them flowering and stop them going to seed. Remember to give them a feed to keep the display going.