Adenophora

I've grown Adenophora tashiroi for many years (purchased in 2005) at the front of the border, where it reaches a height of about 10 inche...Read Mores in regular soil in this low humidity, dry, zone 3 climate. It blooms fairly late in the season here (end of July) and has been perfectly well behaved, with the same plant retaining good form without spreading for 10 years now. I have not found any seedlings, as yet. The foliage turns yellow in autumn and provides good fall colour.

***Please note that the plant being sold by Bluestone Perennials on its website as "Adenophora tashiroi" is misidentifed; it is actually the extremely invasive (and very different) Campanula rapunculoides, a plant which is prohibited from being grown in many states and provinces.

This species is a rock garden plant, growing in a neat non-spreading clump 4-12" tall. Best in full sun in mildly alkaline soil.
<...Read Morebr /> It does not tolerate transplanting or division. Propagate by seed.

This species is nowhere aggressive or invasive. The aggressive and invasive creeping bellflower (Campanula rapunculoides) has been sold under this name (though it looks little like it), which has given this Adenophora an undeserved reputation for invasiveness (a common fate for Adenophoras).

"10-30 cm high, often with procumbent stems. Leaves rather thick, alternate, ovate to broadly ovate, 1.5-3 cm long, 1-2 cm wide, coarsely toothed. Flowers in a terminal, few-flowered raceme, occasionally only single-flowered. Calyx lobes lanceolate. Corolla campanulate, 1.6-2 cm long, violet. Style not exserted. Flowers in July." ---from Jelitto and Schacht, Hardy Herbaceous Perennials, 1990 (Timber Press)

Ground hugging perennial with racemes of violet flowers on spreading stems in midsummer.