The National Trust’s Sky Gardening Challenge 2026 is all about one simple idea: you don’t need a garden to grow one.

For housing associations and landlords, it’s a golden opportunity to help tenants turn balconies, windowsills, doorsteps and shared spaces into pockets of green - boosting wellbeing, pride in place and even the look and feel of your buildings.

This blog sets out what the challenge is about, why it matters for you, and how you can help tenants get involved, even where space is tight.

What is the Sky Gardening Challenge?

The Sky Gardening Challenge is a national campaign encouraging people to garden upwards - using whatever space they have:

• Balconies and roof terraces
• Railings, window boxes and hanging baskets
• Communal walkways and shared courtyards
• Tiny yards, front steps and porch areas

Tenants are invited to grow something, however small: herbs in a tin, flowers in a railing planter, salad in a recycled tub, or climbers along a balcony. The emphasis is on:

• Low-cost, low-maintenance planting
• Reusing containers and materials
• Greening hard-to-use spaces
• Making nature visible from the window or doorstep

For social landlords, it’s a ready-made hook to engage residents in a positive, practical project that benefits both people and places.

Why should housing associations and landlords get involved?

1. Better wellbeing and mental health

Access to green space is uneven - and many tenants live in flats or homes without gardens. Even a few pots on a balcony can make a difference:

• Plants have been shown to reduce stress, improve mood and support mental health.
• Gardening gives people a gentle, achievable sense of purpose and routine.
• Watching something grow can provide comfort, connection and a sense of progress.

Promoting the challenge helps you support tenants’ wellbeing in a tangible, everyday way.

2. Stronger communities and neighbourliness

Shared gardening activity can bring people together, especially where there are:

• Communal entrances or walkways that can be brightened with pots or railing planters
• Residents’ groups who might co-ordinate watering or seed swaps
• Local schools, youth groups or community organisations who can join in

A simple competition or “best balcony” showcase can start conversations between neighbours who might otherwise never speak.

3. Pride in place and better-looking buildings

Encouraging tenants to grow upwards can:

• Soften hard architecture and brighten dull facades
• Reduce littering and minor vandalism where areas feel more cared for
• Improve first impressions for visitors and new tenants

Greener, more vibrant blocks send a clear message that people live here, and this space matters.

4. Supporting sustainability goals

Sky gardening fits neatly with many organisations’ environmental and social value aims:

• More planting means more habitat for bees, butterflies and other pollinators.
• Containers can be created from reused materials (buckets, crates, old tins).
• Tenants who grow herbs or salad at home may reduce food waste and packaging.

It’s a practical way to show you’re backing climate resilience and biodiversity - not just on paper, but on balconies and ledges.

 

How you can support and spread the word

For housing associations and landlords, it’s a chance to support wellbeing, strengthen communities and bring life to your buildings, all through simple, low-cost action.

Here are practical ways housing providers can make the most of the Sky Gardening Challenge 2026.

• Promote the challenge in your communications
• Provide clear, simple guidance
• Involve local partners

It’s about far more than colourful pots. For tenants, it can mean:

• A calmer, greener view from the window
• A new hobby that fits around health needs, work and family life
• A reason to chat with neighbours and share tips

By spreading the word and making it easy for tenants to take part - especially those in small or high-rise homes - you can help grow a network of sky gardens that brighten lives as well as balconies.

Before you promote the Sky Gardening Challenge, it’s worth:

• Reviewing your policies on balconies, external fixtures and communal spaces
• Setting out clear do’s and don’ts (e.g. safe weights, avoiding blocking fire exits, using non-breakable containers in shared areas)
• Making sure frontline staff and housing officers understand the initiative and can answer basic questions

Clear guidelines will protect safety and building integrity, while still giving tenants as much creative freedom as possible.