Plant Matchmaker: Combine These Two Classic Fall Perennials for a Stunning Jewel-Toned Display

Some plant pairings become classics for good reason, and asters with sedum is one of those great combinations that just always seems to work. In my garden, these vibrant perennials don’t even hit their stride until summer starts to wind down. Then, they fill borders with gorgeously rich color while providing a vital food source for pollinators when the rest of the garden has faded.

What I particularly love about this newest addition to our Plant Matchmaker series is that, while the plants look completely different, they make each other look better – it’s soft abundance meets bold structure. The upright sedum (Hylotelephium), also known as stonecrop, produces broad, flattened flowerheads packed with tiny flowers, while asters bloom with clouds of delicate daisies on slender branching stems.

As both plants peak in late summer and fall, they offer a brilliant final display of color. But the pairing isn’t all about flowering time – both plants thrive in sunny borders and are inherently low-maintenance, requiring little effort once established.

Which Varieties to Choose

While there are numerous varieties of these plants you can mix and match, it’s hard to go wrong with the ever-popular ‘Autumn Joy’ sedum, available from Plant Addicts. It’s a staple in my garden. Yes, it’s a predictable choice, but it’s popular for a reason and never puts a foot wrong.

Other winning sedum options include the richly hued Mr. Goodbud sedum, from Nature Hills; Rock N Grow Back in Black sedum, from Plant Addicts, for a more dramatic color contrast; or, for extra height in the border, pastel-pink Matrona.

For asters, I grow the amellus type – aka Italian aster – which is naturally neater and more compact at around 1–2 ft tall, with lovely large lilac-blue daisies. But as long as you avoid an excessive height difference between the two plants, there is a huge range to choose from.

In particular, compact dwarf varieties – like the purple October Skies asters, available at Plant Addicts, or pink Woods Pink asters from Garden Goods Direct – work well in this pairing as they are more balanced with the sedum. But even a taller variety like New England asters, which you can start from seed with this Kviter pack from Amazon, can work when the sedum is used to disguise the legginess of the asters.

Flowers can range from classic daisy forms to unusual types that look like cornflowers (see Peachie's Pick Stokes asters at Plant Addicts), zinnias (like these bold pink Henry III asters), or even mums (like this gorgeous Grape Crush variety from Nature Hills).

Why Sedum and Asters Work Together

There is something so joyous about the colorful combination of sedum and asters. The warm pink, bronze, or red tones of tall stonecrop flower heads contrast and harmonize beautifully with the purple or pink daisy-like blooms of aster, while the yellow centers of the asters add a lovely sunny accent.

Yet, the biggest reason this pairing works so well is the plants’ form. Sedum is such a strong structural plant, while asters are looser and wilder. The architectural form of the stonecrop is softened by the frothy asters, keeping the overall look neat but natural.

When planting, avoid isolated single plants or an ordered alternating pattern. They will look more natural planted in loose groups. Position taller asters towards the back and use sedums to form generous forms in front. Dwarf asters give more flexibility for positioning. Let the edges of the plants mingle slightly. In large borders, repeat the plant combination at intervals for good design rhythm.

How to Grow Them Together

As well as looking good together, stonecrop and asters have compatible growing requirements. Both thrive in full sun and well-draining soil. There are sedums and asters suitable for gardens across a broad range of USDA zones, although exact hardiness varies somewhat by species and cultivar. Certainly, there are options to make this pairing work in zones 3–8.

The main consideration is moisture. Sedums are tough, drought-tolerant perennials that dislike wet, rich soil, while many asters appreciate more consistent moisture. A moderately fertile, free-draining site that doesn't stay soggy is a good compromise. Neither plant needs heavy feeding, either, and overly rich soil can encourage soft, floppy growth.

As flowering winds down, don't be too quick to cut the plants back. Asters are an important late-season nectar source, while the fading flowerheads of sedum continue to change color and add interest long after the blooms have peaked. If you leave the spent stems standing through winter, cut them back before fresh growth begins in spring.

The architectural flower heads of Autumn Joy can persist well into winter, adding structure and color to an otherwise sparse garden. Cut them back before new growth begins in spring.

It’s this long season of interest that makes sedum and asters such an enduring fall combination. They take over when most summer stars are beginning to fade and ensure the garden heads into fall with a flourish.