A cultivar within the Verbascum genus, Verbascum bomb. 'Polar Summer' shares the group's origin across Europe and Asia, with the greatest species diversity around the Mediterranean. Members of this genus are commonly biennial or perennial; they spend an initial period as a ground-level rosette before producing a tall, central flowering stem. Flowering runs from June to September, giving several months of vertical colour where established. Plants are useful where soils tend to be dry: mulleins are noted for flowering reliably even in such conditions. Expect a season in rosette form followed by a decisive upright spike that carries numerous blooms; after flowering many mulleins set capsules containing fine seed. Give a free-draining spot and room for the flowering stems to rise clear of lower plants, and they will provide sustained interest through the summer months. Use Verbascum bomb. 'Polar Summer' as a vertical accent in perennial borders or in gravel and dry beds where a narrow, tall bloom stem is desirable. The rosette-to-spike lifecycle also makes it straightforward to predict when seed capsules will form, which helps if you wish to collect seed or allow self-sowing in a chosen area.

Verbascum bomb. 'Polar Summer' is a cultivar of mullein that produces tall, narrow flower spikes over an extended season from June to September. It typically forms a dense basal rosette of leaves before sending up a conspicuous flowering stem. As with other mulleins, it tolerates dry soils and is valued for long, steady flowering. The plant belongs to the Scrophulariaceae family and sits within the Verbascum genus.

Verbascum bomb. 'Polar Summer' produces tall flower spikes from June to September and tolerates dry soils.

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