Wallbarn M-Tray Wildflower Modular Green Roof System

Bring biodiversity to your rooftop with the Wallbarn M-Tray® Wildflower System—a ready-to-install modular green roof that combines vibrant wildflowers with hardy sedum in specially engineered trays. Each tray is pre-planted with a carefully curated mix of native UK species grown from seed at our own nurseries, offering a natural, pollinator-friendly habitat right above your head. The M-Tray® system makes green roof installation fast, clean, and simple. The trays are lightweight and easy to carry, clicking together to form a seamless blanket of vegetation. Designed for long-term performance, they contain a bespoke low-nutrient substrate that supports perennial wildflowers and sedum varieties known for their resilience and ecological value. These green roofs not only look stunning in full bloom but also offer a practical and meaningful way to improve biodiversity in urban environments—encouraging bees, butterflies, birds, and other wildlife back into built-up areas.

Key Features & Benefits

Instant green roof solution – fully established sedum/wildflower mix for immediate impact Trays click together – forming a seamless, natural-looking finish Pre-grown in the UK – using native wildflowers and sedum species for optimal biodiversity Designed for wildlife – attracts pollinators and supports urban greening schemes Low-maintenance substrate – supports hardy, perennial plant growth Deep root zone (100mm) – ensures healthy, long-lasting vegetation Fire-rated – classified B ROOF (t4) in accordance with CEN/TS 1187 Test 4 Easy installation – trays can be lifted into tricky areas and fitted with minimal fuss Flexible access – trays can be removed and replaced individually for deck maintenance

What to Consider with Wildflower Roofs

Wildflower green roofs are beautiful and ecologically rich, but they behave differently from traditional sedum roofs. Here are a few key points to keep in mind: Wildflowers grow taller and die back in autumn, leaving stems and seed heads that can become dry and potentially flammable if not maintained They offer seasonal blooms but less year-round ground cover than sedum-only roofs Flowering typically starts in the second year; growth and bloom cycles depend on weather conditions Some re-seeding may be required to maintain a consistent display They require slightly more upkeep, such as deadheading, occasional replanting, and seasonal checks The sedum component helps to maintain a green appearance all year round, even when wildflowers are not in bloom, ensuring a visually pleasing and ecologically valuable result across all seasons.

FAQs – Wallbarn M-Tray® Wildflower

How long will it take for the wildflowers to bloom?

Most wildflower species begin flowering in their second year. In the first year, they focus on root and foliage development, which is essential for long-term health and resilience.

Do wildflower green roofs need regular maintenance?

Yes, they require more maintenance than sedum-only roofs. Expect to carry out light weeding, trimming, and re-seeding where needed, especially after winter or periods of drought.

Will the trays stay green all year round?

The sedum component is designed to provide consistent ground cover throughout the year. Wildflowers offer seasonal colour and biodiversity, with the sedum ensuring the roof doesn’t look bare outside of flowering periods.