Some Perennials to Water Only One Time a Month

This very impressive list of perennial flowering plants is suggested by author Ron Lutsko, in the summer issue of “Pacific Horticulture,” for gardens that “are watered only once a month during dry times.”

It contains fairly common plants and many with unpronounceable names that will be harder to find, but that is the challenge--to find interesting plants that need less water.

Achillea ageratifolia

Achillea clavennae

Achillea umbellata

Achillea ‘Moonshine’

Agapanthus

Agave

Aloe

Armeria maritima

Artemesia absinthium ‘Lambrook Silver’

Artemesia ludoviciana var. albula

Artemesia ‘Powis Castle’

Aurinia saxatilis (Alyssum saxatile) ‘Citrina’

Balotta

Boltonia asteroides ‘Snowbank’

Calamagrotis foliosa

Centranthus ruber

Cerastium bieberstenii

Cerastium tomentosum

Convolvulus cneorum

Convolvulus mauritanicus

Cotinus coggygria ‘Purpureus’

Dietes vegeta

Echeveria

Erigeron glaucus

Erigeron ‘Moerheimii’

Eriogonum giganteum

Eriogonum umbellatum

Eryngium eburneum

Euphorbia characias wulfenii

Euphorbia griffithii ‘Fireglow’

Euphorbia rigida

Felecia amelloides

Festuca amethystina

Festuca californica

Festuca idahoensis

Gaura lindheimeri

Helianthemum

Helichrysum

Helictotrichon sempervirens

Heuchera Bressingham Hybrids

Iberis sempervirens ‘Snowflake’

Iris ‘Canyon Snow’

Iris, tall bearded

Kniphofia

Lavandula angustifolia ‘Hidcote’

Lavandula angustifolia ‘Munstead’

Lavandula dentata

Lavandula stoechas nana

Lechenaultia biloba

Leonotus leonurus

Libertia

Lithodora diffusa ‘Grace Ward’

Lobelia erinus

Malva alcea ‘Fastigata’

Nepeta

Onosma tauricum

Pemstemon heterophyllus

Penstemon spectabilis

Penstemon ‘Evelyn’

Penstemon ‘Holly’s White’

Penstemon ‘Huntington Pink’

Penstemon ‘Midnight’

Perovskia atriplicifolia

Phlomis russeliana

Phlox douglasii ‘Rosea’

Phlox drummondii

Phlox subulata

Phormium

Plecostachys serpyllifolia

Puya

Romneya coulteri

Rudbeckia

Ruta graveolens

Salvia clevelandii

Salvia farinacea ‘Victoria’

Salvia haematodes

Salvia leucantha

Salvia officinalis ‘Purpurea’

Salvia sclarea

Santolina virens

Scabiosa columbaria

Senecio bicolor (S. cineraria)

Senecio bicolor ‘Cirrus’

Senecio leucostachys

Senecio ‘Sunshine’

Sisyrinchium

Sollya heterophylla

Stachys byzantina ‘Silver Carpet’

Stipa cernua

Stipa gigantea

Teucrium chaemedrys

Teucrium cossonii

Teucrium fruticans

Thymus ‘Peter Davis’

Verbascum

Verbena bonariensis

Veronica incana

Yucca whipplei

Zauschneria californica