Mature size & growth rate

How big does Symphyotrichum oblongifolium 'Raydon's Favorite' (Symphyotrichum oblongifolium 'Raydon's Favorite') get?

Also called Raydon's Favorite aromatic aster.

More about symphyotrichum oblongifolium 'raydon's favorite'

About Symphyotrichum oblongifolium 'Raydon's Favorite'

Symphyotrichum oblongifolium 'Raydon's Favorite' · also called Raydon's Favorite aromatic aster · flowering

'Raydon's Favorite' is an aromatic aster prized for a late-season blanket of lavender-blue, yellow-centered daisies in autumn. This tough, drought-tolerant North American native forms a mounded clump of fine, fragrant foliage, thrives in full sun and lean soil, and is a magnet for late-flying bees and butterflies. ASPCA-listed asters are non-toxic.

Mature size: 60-90 cm (2-3 ft) tall and 60-90 cm wide; pinching in early summer keeps it compact and self-supporting.

Watch for — Floppy, splayed stems: Caused by too much shade or rich soil. Grow in full sun and lean ground, and pinch stems back by a third in early summer to force sturdier, self-supporting growth.

Indoor size vs how big it gets in the wild

Symphyotrichum oblongifolium 'Raydon's Favorite' stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect 60-90 cm (2-3 ft) tall and 60-90 cm wide. In the ground with no restriction it is a completely different plant — pinching in early summer keeps it compact and self-supporting. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

Symphyotrichum oblongifolium 'Raydon's Favorite' is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: undemanding. a single spring topdressing of compost is usually enough; skip high-nitrogen feeds, which produce floppy, mildew-prone stems and fewer flowers on this lean-soil native.

Want this turned into the right next pot at the right moment? The pot size calculator and the symphyotrichum oblongifolium 'raydon's favorite' repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast symphyotrichum oblongifolium 'raydon's favorite' grows.

How to keep symphyotrichum oblongifolium 'raydon's favorite' smaller

You are not stuck with the maximum size. For symphyotrichum oblongifolium 'raydon's favorite' specifically, these are the levers, in order of impact:

Divide the clump every year or two — splitting symphyotrichum oblongifolium 'raydon's favorite' is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide symphyotrichum oblongifolium 'raydon's favorite' out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow symphyotrichum oblongifolium 'raydon's favorite' bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for symphyotrichum oblongifolium 'raydon's favorite' the accelerators are:

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Good light plus regular feeding maximises offset and runner production.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

Light is almost always the ceiling. The symphyotrichum oblongifolium 'raydon's favorite' light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When symphyotrichum oblongifolium 'raydon's favorite' outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for symphyotrichum oblongifolium 'raydon's favorite':

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the symphyotrichum oblongifolium 'raydon's favorite' repotting guide. If you want more of this plant instead of a bigger one, the symphyotrichum oblongifolium 'raydon's favorite' propagation guide turns prunings into new plants.

Symphyotrichum oblongifolium 'Raydon's Favorite' size — frequently asked questions

How big does symphyotrichum oblongifolium 'raydon's favorite' get?

Symphyotrichum oblongifolium 'Raydon's Favorite' reaches 60-90 cm (2-3 ft) tall and 60-90 cm wide when grown indoors, and far larger where it grows unrestricted (pinching in early summer keeps it compact and self-supporting.). Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is symphyotrichum oblongifolium 'raydon's favorite' slow or fast growing?

Symphyotrichum oblongifolium 'Raydon's Favorite' is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Symphyotrichum oblongifolium 'Raydon's Favorite' stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does symphyotrichum oblongifolium 'raydon's favorite' take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep symphyotrichum oblongifolium 'raydon's favorite' smaller?

Divide the clump every year or two — splitting symphyotrichum oblongifolium 'raydon's favorite' is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make symphyotrichum oblongifolium 'raydon's favorite' grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Good light plus regular feeding maximises offset and runner production. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.