Bog pimpernel Commonly known as bog pimpernel, Anagallis tenella forms a dense carpet of tiny evergreen leaves, mixed with numerous rosy pink flowers from late spring to early summer. This spreading, native plant is ideal in a bog garden or very shallow water. Position: Full sunPlanting depth: Grow in the damp margin to level with the water surfaceGrowth rate: MediumFlowering Period: June to AugustHardiness: HardySize: Height: 10cm (4") Spread: 40cm (16") Aquatic pot and compost variations Aquatic plants come in a variety of pot and compost variations that have different benefits for planting and growing. Mesh Pot (Aquatic Compost)Pot can be removed and plant can be planted directly into soil or margins above or below the water line. Pot and plant can also be placed directly into water to be container grown, but will still need repotting in time. Pot (Aquatic Compost)Pot must be removed and plant should be planted directly into soil or margins above or below the water line. Pot (Regular Compost)Pot must be removed and plant should be planted directly into soil or margins above the water line. Cannot be planted directly into soil below the water line.