Euphorbia palustrisLarge clusters of bright greenish-yellow flowers in late spring. To 48in (1.2m). Bushy herbaceous perennial. | Flowering period: Late spring. | | Growing conditions: Moist, well-drained soil, even clay. Dislikes dry conditions. | | Typical mature height: 48 inches ( 122 cms ) | | Hardiness: - to discuss further |  | This plant has been awarded the Royal Horticultural Society's Award of Garden Merit (AGM). | |

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