permaculture edible water garden for station platforms

Wetland garden for station platforms. This garden invites passengers to scoop water for the plants while they wait for their train: people are part of the design. Every plant has two or more funcions, naturally. Try and guess
asparagus

This plant has dreamy fluffy leaves, delicious stems to eat, and lives for 20 years.

angustifolia

There are so many enchanting groundcover plants with blue flowers, and this garden is elevates them to a few centemeters from the eyes of passers-by, for full appreciation. Trailing varieties protect pots from direct sun on blazing days, and they act as a living mulch, keeping water in, keeping weeds down.
These tiny fanflowers would work too. Thankyou asymptotia

bulrushes
Bullrushes purify pondwater, and their reeds can be dried and used to make ...
Tivoli gardens
...a thached roof for your duck.
Or...
a van gough chair

Iris
This plant is beautiful beautiful. Like most things in this garden, it will be gone over winter, but its bulb will lay in wait. We can cover the soil with some clover-like plant for winter. That will modestly cover the bare soil, and act as green manure, to be tilled under in spring.

Could we have fish in the pond? Since water will be circulated, oxygenated, they will be clean and happy, and make the garden even more interactive. Maybe with a mesh just under the waters surface, to prevent escape.

Lotus: enjoy the fragrance and flowers, maybe choose a variety which you can eat once the leaves die down in winter. they seem very quick-growing, and will make a big impact.

Taro for eating, and looking good: loves water

purple taro

All these plants rely on very fertile, well-drained soil, so we need to get started now, creating wormcast from kitchen scraps, in time for the spring.