(image from google images)

Common name: Round-leaved oregano

Size, form, texture: Height 4 inches, width 8 inches, clump forming ground and rock cover.

Hardiness, origin, native ecology: Zone 7-9, very good plant for bumblebees, open soil that heats up is required for bumble bee nesting, need full sun and very well drained soil.

Bud, foliage, flower and fruit characteristics: Bracts obscure flower, start green/yellow then goes pink then brown, disintegrates quickly. Blooms for months and months, blue-green slightly rounded heart shaped leaves.

Cultural and maintenance requirements and appropriate uses in the landscape: can be used in planters, hanging baskets, as edging, very attractive plant.

(image from google images)

Common name: bee balm

Size, form, texture: colony forming, height 2-4 ft, spread 2-3 ft

Hardiness, origin, native ecology: native to Canada and US, very attractive to bumble bees, perennial. Prefers moist site, won’t survive dry conditions, can be used as marginal plant near a pond, full sun to part shade.

Bud, foliage, flower and fruit characteristics: somewhat stoliniferous, flowers are red, pink or white (very light pink). Interesting looking, buds at each node, has versitilasters, good for hummingbirds, midsummer flowering,

Cultural and maintenance requirements and appropriate uses in the landscape:  Deadhead flowers to prolong blooms, can thing foliage to prevent overcrowding and control spread of plant, good for naturalizing areas, attracting habitat, rain gardens, and as a herb. Powdery mildew can be a big problem, thinning plant to increase air circulation can reduce fungal issues.

(image from google images)

Common name: Russian sage

Size, form, texture: height 3-5 ft, spread 2-4 ft, woody perennial.

Hardiness, origin, native ecology: zone 5-9, native to the Himalayas and western China, grows in average, dry to medium, well drained soil in full sun. Drought tolerant, flops in any shade, can be cut back to ground in early spring.

Bud, foliage, flower and fruit characteristics: Lavender blue blooms in July to October, finely dissected grey green leaves, aromatic and edible.

Cultural and maintenance requirements and appropriate uses in the landscape:  Long summer bloom for perennial border, good in herb gardens, contrasts nicely with both pink (roses, mallow, phlox) and yellow (rudbeckia).

(rhs.org.uk)

Common name: Spanish/butterfly lavender, often sold as Lavandula stoichus

Size, form, texture:  small aromatic evergreen shrub, bushy, height 0.5-1 m, spread 0.5-1 m.

Hardiness, origin, native ecology: good for use in zeroscape garden, can tolerate significant drought with no irrigation, need good drainage or they die, good on gravelly slopes, associates well with english lavender. H 3, South, west or east facing slope.

Bud, foliage, flower and fruit characteristics: more fuchsia purple, distinct prominent bracts, more attractive then english lavender, works well with green and grey colour combinations,

Cultural and maintenance requirements and appropriate uses in the landscape: good in containers, on slope, terraced garden, needs sheltered spot in sun, low water use, however grey mould can be a problem. Attracts pollinators.