irises – Charlton and Blackheath Amateur Horticultural Society

Pat’s 10 jobs for May 2026

Lonicera americana in full flower for night-flying moths

1. At this time of year when the weather is warm early Dutch honeysuckle (Lonicera periclymenum) and Lonicera americana are a magnet for night-flying moths attracted by the spicy scent, so try growing one if you have the space.

2. If seedlings and cuttings are growing away well, put them outside during the day to harden off then bring them in at night if the weather is cold.

3. Iris are in spectacular full flower now, but be sure to keep their rhizomes free from weeds so they get baked by the sun which will aid flowering next year.

Irises in flower in a raised bed (but somewhat congested) — Glorious irises in flower – including Iris ‘Député Nomblot’

Iris 'Député Nomblot' in a friend's garden — Glorious irises in flower – including Iris ‘Député Nomblot’

The Gatehouse

Well used to opening in the summer to raise money for the local hospice, this year Ruth and Matthew opened their garden ‘The Gatehouse‘ for the National Garden Scheme in the spring. Ruth said she bought ‘something like’ 2,000 bulbs, not surprising in a garden of this size!

Described in the NGS Handbook as ‘one of London’s largest private gardens’, the grounds were originally part of Eltham Palace and are presided over by a hugely imposing copper beech. The great wall surrounding the garden and the mature trees lend the garden an immediate air of gravitas.

Narcissus 'Thalia' and tulips at The Gatehouse, April 2026 — *Narcissus* ‘Thalia’ and pink & white tulips

A brilliant red and purple which might not have worked together but looked stunning. The Gatehouse, April 2026 — *Narcissus* ‘Thalia’ and pink & white tulips

A Visit to RHS Harlow Carr

Jean and I were very sorry to miss the (highly successful) plant fair on 19 May but we did have a lovely visit to the fabulous garden at RHS Harlow Carr instead.

Sycamore sculpture, RHS Harlow Carr, May 2025

RHS Harlow Carr is a short drive or bus ride away from Harrogate, a very elegant spa town in North Yorkshire. The garden opened in 1950 with the intention of trialling and showcasing plants that would thrive in a northern climate as opposed to the possibly easier growing conditions of RHS Wisley.

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.

Hylotelephium telephium 'Touchdown Teak'

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.

Plant of the Month: Iris (May 2024)

The show gardens at the Chelsea Flower Show each May just zing with the stunning colours of the irises in bloom and they really are one of the main attractions (apart from roses) that are on display. Being ‘show-stoppers’, their impact allows the designers to then infill and arrange around them the more delicate flowers and foliage to an harmonious effect. Visitors admire, with ‘oooh’s and aaah’s’ at the soft, subtle shades and again, of the deeply-rich and vibrant colours of each and every iris grouping.

The name Iris means rainbow and in Greek mythology ‘Goddess of the Rainbow’. The petals and roots of several species, including Iris germanica (bearded) and Iris pallida (Dalmatian/Orris root) are used in the beauty industry, in the manufacture of perfumes, lotions, in food such as spices and even added to gin. Seemingly, the dried root, after 3 years, has the aroma of violets. This industry goes back to the ancient Greeks, Romans and Egyptians and probably long before their time.

I have an Iris pallida flowering in my front garden, low-growing, which is highly fragrant. This was kindly given to me by Penny S some years ago. The flower is fading so unfortunately not worthy of a photograph but it certainly should be grown, as the variegated grey-foliage blends nicely with neighbouring plants. I wouldn’t be without it.

My number-one favourite, though, is Iris ‘Langport Wren’, a Kelways‘ introduction from 1973 and deservedly worthy of the RHS Award of Garden Merit. It was flowering in my front garden until a few days ago when the slugs/snails chomped its head off! The fragrance is reputedly of orange and chocolate – but I wouldn’t know as I haven’t had the chance to find out!!! The first photo below is of this delectable flower, a painterly amalgamation of browns, purples and russets, growing in Margaret T’s garden.

Spring in Cornwall

I have just spent a very happy week at Duloe Manor, a complex of self-catering holiday apartments and cottages near Looe in Cornwall. The main house was built in the 1690s for the Rectors of the local church. The whole complex is set in lush gardens of around three acres: a few mixed beds contained lovely combinations of saxifrages, irises and other familiar perennials while in less formal areas, swathes of wild garlic provided backdrops for beautiful pink campions as well as English bluebells in full bloom. In the car park several banks of pale yellow primroses remained stubbornly but delightfully in flower! Majestic rhododendrons provided splashes of magenta and purple.

A mixed bed contained lovely combinations of saxifrages, irises and other familiar perennials

Majestic rhododendrons provided splashes of magenta and purple

The View from my Window

A piece inspired by Kathy’s entertaining post.

I, too, have a comfy seat looking out on my garden where I spend many happy hours deciding what changes need to be made in my garden (there is always something).

I am currently enjoying watching my pots of bulbs grow and begin to flower. I posted a photo on Facebook of my Harmony irises and my friend in Norfolk (who I think was rather envious) suggested I had a microclimate in my garden. It is very sheltered and faces west so maybe I do.

I have just decided to empty my rather unsightly compost bin and replace it with a smaller, more discreet one. I therefore have a large pile of compost which I am in the process of shovelling around the garden. I am expecting a spectacular display later in the year!

My Clematis Armandii under the tree is budding nicely. I planted it some years ago and was disappointed last year that I had so few flowers on it. That was until I looked out from the upstairs window and discovered that my neighbours were enjoying a beautiful display! It had put all its energy into growing to a lighter spot in the garden next door!

I find this time of year quite difficult garden-wise, especially when the weather is mild, as it is at the moment. I am having to restrain myself from going wild with the secateurs and cutting everything back. I shall wait another month before giving my clematis, roses and salvia a good hair cut. I think it is also time to give the Hibiscus Syriacus Woodbridge a trim as it has grown rather tall and thin.

I hope other people will write about their views, as Kathy suggested.

Carolyn H

Plant of the Month: Iris unguicularis (January 2024)

As much as I love this perennial and have planted many clumps over the years, I find it struggles in my clay soil. My now, one-and-only plant, obviously needs more sun and perhaps lighter soil, as it has flowered perhaps only once this winter and that was on 23rd November, when I took the photograph below. But Margaret T’s winter irises have been really putting on a display, with her two clumps producing 2-3 flowers at a time, on and off since December. And these will carry on flowering well into March. I’ve seen them flowering profusely when nestled against sunny, front elevations, in poor soil. But in Margaret T’s garden, the soil is rich from regular additions of compost and manure and you can see by her photograph that she has healthy, plump plants.

Visit to RHS Wisley

On Saturday 11^th February Jean and I spent a very pleasant day at RHS Wisley. This was the last day of the Iris and Cyclamen Show held in the Hilltop event hall.

The Iris and Cyclamen Show at RHS Wisley

The displays were beautiful. So uplifting to see so many spring colours after a long, cold winter. We were amazed at the variety in size and pattern of cyclamen leaves, all in perfect condition of course.

Pots of cyclamen at the Iris and Cyclamen Show at RHS Wisley

The Iris Fields of Hall Road, Wenhaston IP19 9HF were selling small pots of irises to which we both succumbed!