Spring Fling

Seed Shaker – Open Source Rewilding Pack

A refillable, pocket-sized seed shaker designed for urban rewilding.

This flower-shaped shaker is made to be taken out into the world — on walks, commutes, lunch breaks — and used to scatter seeds into overlooked urban spaces. A small, simple way to bring colour, biodiversity and life back into the city.

The design is optimised for low-waste, accessible 3D printing:

• No supports required
• Minimal material use (perfect for end-of-roll filament)
• Mono-material construction
• Fully mechanical (no magnets, glue or inserts)
• Durable, refillable, and designed to be used again and again

We recommend printing in PLA, but feel free to use whatever material you have available — including leftover or end-of-roll filament.

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Seed Mixes (UK Examples)

These mixes are designed for different UK soil conditions. If you’re elsewhere, use this as inspiration and create a mix suited to your local ecosystem.

Always mix seeds with ~50% horticultural sand.
This helps distribute seeds more evenly, prevents overseeding, and makes it easier to see where you’ve scattered.

London – “Stubborn Clay” Mix

Heavy, compacted, often waterlogged, then bone dry. Needs tough survivors.

• Common Poppy — thrives in cracks and poor soil
• Cornflower — fast-growing pollinator favourite
• Oxeye Daisy — hardy perennial, loves clay
• Red Campion — handles shade (walls, tree bases)
• Yellow Rattle — suppresses grass to let wildflowers thrive

Brighton – “Coastal Chalk” Mix

Dry, alkaline, windy, and exposed.

• Viper’s Bugloss — thrives in rubble and chalk
• Kidney Vetch — supports Small Blue butterflies
• Wild Clary — loves hot, dry verges
• Lady’s Bedstraw — dense, honey-scented ground cover
• Restharrow — tough, woody, survives trampling

Leeds – “Northern Grit” Mix

Cooler, wetter, more acidic, moisture-retentive soils.

• Foxglove — prolific self-seeder
• Teasel — structural, feeds birds in winter
• Selfheal — semi-evergreen ground cover
• Ragged Robin — thrives in damp patches
• Bird’s-foot Trefoil — improves poor soil, pollinator-friendly

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Important – Usage & Intent

This design is shared freely in the spirit of sustainability and collective action.

• Download, print and share
• Use it to rewild your local environment

But:

• Do not sell this design or use it for commercial gain
• Do not redistribute behind paywalls

Let’s keep this open, accessible and community-led — because rewilding belongs to everyone.