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Helen's monthly choice - September

Helen Derrin

Helen Derrin, Crocus plant doctor


Last updated August 2024

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September always feels like a pivotal month of the year. We can still lap up the last of the summer sun on warmer days, but the evenings have now starting to take on a cooler, autumnal edge. There’s still plenty of late-flowering colour to enjoy (see below for a few of my favourites), but now the hottest days are behind us, it’s time to start making plans for next years display. I want to make sure I've oodles of colour to look forward to, so one of my priorities will be putting together a few spring-flowering bulb combinations, and getting my order in early - before the most popular (or unusual) ones sell out. Also, towards the end of the month (and before the weather starts to turn nasty), I’ll be lifting, dividing and replanting any clumping perennials that have gotten too big. Not only will this give them additional 'get up and go' next year, but it will also give me a few extras to fill gaps in the border.

My favourites for September

Echinacea purpurea 'Rubinstern'

The pinky red rays of this wonderful coneflower form a near-horizontal ruff around the prominent orange-brown cone, adding colour as well as structure - while also attracting masses of beneficial insects into your garden. Long-flowering, handsome and reliable, this adaptable perennial is perfect for prairie, cottage and meadow-style planting schemes, where it will continue to flower until September or October if dead-headed regularly.


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Fuchsia 'Mrs Popple'

A popular, award-winning shrub, ’Mrs Popple' is a hardier fuchsia, that offers maximum impact with minimal fuss. Typically in bloom for 5 months or more each year, it’s an adaptable and easy to grow plant that brings colour and life to pots, borders or low hedges. Appearing in abundance in loose trusses from June onwards, each inky purple flower has a showy cluster of prominent pink stamens, and is encased with a bright crimson tutu-like corolla. A jewell-coloured beauty, it takes the transition from summer to autumn in its stride without skipping a beat.


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Verbena bonariensis

If you're looking for something to add height without density, then this popular perennial is perfect. Often flowering from June to October, it settles naturally into virtually every garden style, and is highly sought after by bees, butterflies and moths. Appearing in small clusters on wiry, branching stems, the flowers create dollops of colour that seem to hover and sway in the gentlest breeze. They'll also last well if cut for the vase.


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Anemone × hybrida 'Honorine Jobert'

Every garden (especially the shadier ones), should have some of these to brighten up the autumn garden. Once settled in, it naturalises easily, forming large clumps that can be divided and replanted every few years, and the flowers are great for cutting. Use it to fill gaps at the back of a border, where it’s robust enough to stand up well without flopping - even in unpredictable weather. First discovered in Verdun, France in 1858 it’s still one of the best loved Japanese anemone of them all.


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Rudbeckia fulgida var. sullivantii 'Goldsturm'

First introduced around 60 years ago, this plant has won heaps of well-deserved awards over the years. Producing an abundance of flowers over a really long period, it’s short enough not to need staking, its long-lived and low maintenance, and it attracts butterflies, bees and hoverflies. If there’s room, plant it in bold drifts where the golden yellow flowers can be lit up in the low autumn light.


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