Pelargonium – Charlton and Blackheath Amateur Horticultural Society

Pat’s 10 jobs for September 2025

1. Well at last the rain has arrived and is ready to drown all our plants! You may need to empty those saucers you put under pots for some of your more tender plants before they drown or rot…

2. This month and next is a good time to cut down and split many perennials ready for our sale at the Horn Fair on 19 October which soon comes round. I split sedum and Hesperantha the other day. I needed two forks back to back but made about fifteen plants! Check which plants are suitable for splitting in Autumn as some are better done in Spring.

3. Increase your supply of Pelargoniums by taking cuttings now below a leaf node. It also provides insurance for next year. We always love unusual varieties for the sales table if you can spare them.

This Aeonium will not like sitting in a saucer of water! — Don’t let your pots drown! Geranium clump ripe for division, and Pelargonium cuttings

A clump of Geranium macrorrhizum ready for division — Don’t let your pots drown! Geranium clump ripe for division, and Pelargonium cuttings

Fantasy garden tables

Those of you who are regular viewers of BBC Gardeners’ World will most likely have noted Monty Don’s table of potted plants, which varies throughout the seasons and looks like something most of us can only dream of! In a recent article by Alice Vincent, she describes what she calls Monty Don’s ‘Fantasy table’. (My latest garden fantasy? An elegant table covered in flower pots)

The scale of Don’s table and the amount he has displayed is something many of us may aspire to, myself included! On a recent visit to Anna L’s garden, I was impressed by how she had similarly grouped a range of plants in pots, a mix of bulbs, a small Phlox stolonifera, Violas, a Clematis waiting to be planted and a miniature Hosta. Anna very kindly listed the plants for me and you can see from this that a display does not have to be carefully curated, but a selection of whatever takes your fancy!

Anna's garden table — Anna’s plant table in late spring, featuring:
Narcissus ‘Thalia’ and N. ‘Pipit’; Clematis ‘Rising Star’ and C. ‘Bees’ Jubilee’; Pelargonium australe; Phlox stolonifera ‘Fran’s Purple’; Anemone de Caen blue-flowered; Primula ‘Stella Neon Violet’; Phormium; purple Viola; Hosta ‘Lemon Stiletto’

Pat’s Jobs for July

1. Top of the list for July is pruning wisteria, taking back that whippy growth to 2 to 3 buds from the main stems.

2. Sweetpeas should be flowering by now so make sure to keep cutting the blooms and give them a feed and plenty of water. They cease flowering quickly if not picked twice a week.

3. Deadhead all your perennials and annuals regularly unless you want them to set seed for next years sowing.

Never say ‘Never’

A few years ago I cleared out my greenhouse following the losses of the winter and dumped in my compost the remains of pelargoniums and other dead items. It’s always a little sad to lose much loved plants which have given you their best. I then had some fun ordering new plants to replace the old ones (and some others!). A couple of weeks later, I found several of my ‘dead’ pelargoniums lying in the compost and sprouting new shoots from the roots. Of course, I swiftly took them out and potted them up to achieve lovely healthy plants. I am now a little less impatient to discard anything that looks dead.

Sussex Prairie Gardens

The Sussex Prairie Garden is a six acre garden with naturalistic planting, created by Paul and Pauline McBride, who worked with Piet Oudolf some years ago. The garden is on a farm and surrounded by oak trees, featuring a wide range of herbaceous perennials, Veronicastrums, Thalictrums, Persicarias, Sanguisorbas, Kniphofias and Hemerocallis. Huge drifts of ornamental grasses and Asters extend the season of interest hugely. In addition to the planting in the borders there are some massive pots beautifully planted up with huge salvias, Melianthus Major and splendid Pelargonium Tomentosum. The expansive beds are planned with winding rough paths to allow visitors to wander through, brushing grasses and Heleniums as they pass. It is definitely a garden for a late summer visit and seems to have managed remarkably well through this hot summer of 2022.

The plant fair on the day of our visit was spread out through the garden and accompanied by a band and stalls selling refreshments. It had a decidedly festive air! There are dozens of varieties of Miscanthus, Panicums, Molinias, Sporobolis and Penisetum and several of the plant stalls capitalize on this by selling a good selection of grasses.

Beds of mixed grasses and herbaceous perennials

The garden is at its best in late summer and into the autumn as might be expected from the nature of the plants. I have visited earlier in the year when there is far less to see.

The planting is bold and on a grand scale, not much of it less than a metre tall, but for anyone interested in growing prairie type plants or simply just interested, this is a garden well worth visiting.

Vija

Perch Hill

Thinking we would take advantage of the extra days made available for visits to Perch Hill, we chose the one for container planting. However, on the day it was the dahlias that stole the show and which we will remember!

Although rain was not forecast, we arrived to a little bit of a mizzle and a very grey sky – in the photographs this has tended to deaden the exuberant colours. We were knocked out by Penhill Watermelon, Geri Scott and the delicious Apricot Desire, but it would be impossible to choose one favourite out of all the lovely colours. Although some are critical of the Sarah Raven enterprise, there is no question that the gardens are beautifully styled. Of course, plants are labelled so that anything you see you will find on their website, but it is a commercial business. In fact, it is good to find a label so that you can identify what you are looking at! Salvias are everywhere, edging the herbaceous borders, in pots as well as mixed through the beds. These are such versatile plants.

August blog 1

‘Rubens Peale with a Geranium’, painted by his brother, Rembrandt Peale, 1801. National Gallery of Art, Washington, USA – Patrons’ Permanent Fund — ‘Rubens Peale with a Geranium’, painted by his brother, Rembrandt Peale, 1801. National Gallery of Art, Washington, USA – Credit: Patrons’ Permanent Fund

I found this photo posted on the blog of Garden History Girl. It’s one of the blogs I have at some stage signed up to and now get regular posts. It is worth checking out (overlook the name) and this one contains some fascinating information on pelargoniums / geraniums and snippets of plant history. If you have never been clear on what are pelargoniums or geraniums, this is the one to look at! And there are some lovely pictures too!

Vija