If you want a compact, airy perennial with season-long color, Perovskia atriplicifolia 'Jelena' is a standout. This Russian sage selection forms a tidy, upright clump with silvery-gray foliage and haze-like lavender-blue flower spikes that keep coming through the warm months. At maturity it stays nicely sized at about 14-18 inches tall and spreads roughly 12-14 inches, so it fits easily into borders, gravel gardens, and smaller beds without crowding its neighbors.
Give it a site with full sun and sharp drainage. You will get the strongest stems and the best bloom in bright light, especially in hot, dry spots where many other perennials struggle. Plant in average to lean soil; overly rich soil and heavy watering can lead to floppy growth. Once established, it handles occasional dry spells well, making it a good choice for water-wise plantings and sunny slopes.
Care is simple. Water regularly during the first season to help roots settle in, then let the soil dry a bit between waterings. In late winter or early spring, cut stems back to a few inches above the ground to encourage fresh, dense new growth. Leave the spent stems standing over winter if you like a bit of structure and winter texture, then tidy up before new shoots emerge.
Use 'Jelena' as a cool-toned accent among warm golds and pinks, or repeat it in groups to create a soft, drifting effect. The aromatic foliage adds sensory appeal along paths, and the flowers draw pollinators, helping your garden stay lively from early summer into fall.