We have found 31 plants that meet your criteria.

Giant Catmint ‘Nepeta grandiflora Wild Cat’ A giant catmint with deep purple-blue flowers £5.99 Buy
Price Pruned
Catmint ‘Nepeta Six Hills Giant’ A hardy catmint with lavender flowers NOW £4.99 Buy
Paeony / Peony ‘Paeonia Claire de Lune’ Rare variety with single, lemon yellow flowers £32.99 Buy
Price Pruned
Allium ‘Allium giganteum’ Large, showy lilac-pink globes NOW £5.99 coming soon
Price Pruned
Round-headed Leek ‘Allium sphaerocephalon’ Small, wine-coloured flowers on tall stems NOW £5.49 coming soon
Western Mugwort ‘Artemisia ludoviciana Silver Queen’ Ideal for a Mediterranean garden £5.49 coming soon
Lemon Balm ‘Melissa officinalis’ Lovely, lemon-scented foliage plant £3.99 coming soon
Apple Mint ‘Mentha suaveolens’ Apple-scented leaves £2.99 coming soon
Burning Bush ‘Dictamnus albus’ White flowers and lemon-scented leaves £6.99 coming soon
Price Pruned
Allium ‘Allium Globemaster’ Enormous, deep violet globes NOW £5.99 coming soon
Allium Schubertii ‘Allium Schubertii’ Giant pink starbursts £4.99 coming soon