A Soft, Dreamy Border with Stipa, Salvia and Sidalcea

A Summer Border with Salvia, Sidalcea, and Mexican Feather Grass

This sunny border combines three plants with very different habits: dense violet flower spikes, tall pink stems, and fine grasses that arch through the spaces between them. Salvia nemorosa ‘Caradonna’ forms substantial purple groups near the front and middle, Sidalcea ‘Elsie Heugh’ rises above them with soft pink flowers, and Mexican feather grass spreads through the planting in broad golden drifts.

The border surrounds a gravel path and seating area, with roses and other perennials continuing into the background. It feels full and mature, but not tightly arranged. The grasses overlap neighboring plants, Salvia groups vary in size, and the Sidalcea appears in taller pockets rather than a continuous row.

Main plants used: Nassella tenuissima (Mexican Feather Grass), Salvia nemorosa ‘Caradonna’, and Sidalcea ‘Elsie Heugh’

Key Takeaways

Why This Combination Works

The three plants differ strongly in both shape and texture. ‘Caradonna’ produces dense vertical flower spikes, while ‘Elsie Heugh’ has more open stems carrying individual pink flowers. The grass is finer than either perennial and spreads outward rather than upward.

That difference is especially effective in a large border. Salvia gives the eye clearly defined areas of violet, while Sidalcea rises through the planting without forming a solid wall. The grass fills much of the remaining space and keeps the planting visually connected.

The image also shows why the groups should not be perfectly even. Some Salvia clumps are substantial, others are partly hidden by grass, and the taller pink flowers appear more heavily in one part of the bed. That irregularity makes the planting look established rather than patterned.

Using the Three Main Plants

Salvia nemorosa ‘Caradonna’ provides the strongest flower color. Its dark stems and violet-purple spikes are most effective in repeated groups. After the first main flowering, cutting plants back can encourage a second flush of foliage and flowers.

Sidalcea ‘Elsie Heugh’ adds height without much visual weight. Its pale pink, mallow-like flowers are carried along slender stems, making it particularly useful behind or among lower Salvia. In exposed gardens, neighboring plants can provide some support.

Nassella tenuissima contributes the broadest area of texture. Its fine leaves and flower stems become increasingly golden as the season progresses and move readily in the wind. Use it in loose groups rather than a continuous band.

Important: Mexican feather grass can self-seed aggressively and is invasive or restricted in some regions. Check local guidance before planting it. Where it is unsuitable, substitute a non-invasive fine-textured grass adapted to your area.

Planting Recipe

Care at a Glance

A Few Things to Keep in Mind

The three plants do not have identical moisture requirements. Sidalcea prefers soil that stays more evenly moist, while Salvia and Mexican feather grass are happier with freer drainage. Slight differences in moisture across a broad border can help accommodate all three.

Most importantly, check the status of Mexican feather grass where you garden. Its fine texture is visually effective, but in regions where it is invasive, replacing it with a suitable non-invasive grass is the responsible choice.