Hellebore, Helleborus hybridus.

Poppy, Oriental poppy, Papaver orientale.

Horsetail, Water horsetail, Equisetum fluviatile.

Hibiscus, Hibiscus rosa-sinensis.

Wallflower, Perennial wallflower, Erysimum 'Bowles Mauve'.

Globe Thistle, Echinops bannaticus 'Taplow blue'.

Buttercup, Creeping buttercup, Rananculus repens.