By Anders Lorenzen

Ever since the first Earth Day was held in 1970, each year, the annual iconic event arrives with a key theme around protecting the planet. 

In 2026, the imagery is more evocative than most. The theme of “Earthflower” from the Earth Day Network presents the planet not as something abstract or distant, but as something that is interconnected, living, rooted, growing, and fragile.

But symbolism alone does little to cool cities, restore ecosystems, or secure food supplies in a warming world if this is not put into action. 

Therefore, it must move beyond awareness and into action—down to the level of soil, seed, and place.

As a result, gardening and horticulture are more significant than ever before, as what we choose to plant today is not just about being visually striking, but has huge consequences for biodiversity, climate resilience and adaptation as well as human health. 

Planting for resilience, not aesthetics

For decades, gardening trends have prioritised appearance: neat lawns, exotic ornamentals, seasonal colour. In a more volatile climate and biodiverse world, those choices are not only outdated, but can also speed up climate impacts, biodiversity loss and food insecurity.

Across our fragile planet, rising temperatures, water stress, and biodiversity loss are reshaping what it means to cultivate land—even in small urban gardens. The question is no longer what looks good, but what works and what adds value.

Diversity is the core ethos of resilient planting. What we previously would describe as a messy garden, we now know is actually the most natural and biodiverse friendly way of gardening. Instead of having rows upon rows of the same plant, incorporating mixed planting supports biodiversity, improves soil health, and creates habitats that can better withstand pests, drought, and extreme weather. 

It also means shifting away from water-intensive lawns and towards plants that can tolerate both heat and erratic rainfall.

Drawing from this year’s Earth Day theme of Earthflower is not a symbol of perfection, but a reminder that thriving ecosystems are messy, layered, and deeply interconnected. This is, in fact, how nature itself organised it before we started industrial agriculture and horticulture. 

What to plant this Earth Day in northern Europe

When it comes to choosing what to plant, geographical location is hugely crucial. In this article, I’m focusing on what to plant in northern Europe. 

For those marking Earth Day by getting their hands in the soil, the choices made now—late April into early May—are critical. This is a window where small interventions can have an outsized impact on the growing season.

Wildflowers: Pollinator-friendly planting

Pollinators remain under pressure from habitat loss, pesticides, and climate change. Supporting bee species as well as other insects is one of the simplest and nature and biodiversity-friendly decisions you can take, with quick, gratifying results.

No better way to start by planting wildflowers, no matter how much space you have, you can always designate some areas for wildflowers – even as companion planting – mixed in between your other crops.

There’s a host of different native wildflowers to focus on, and in most plant nurseries and garden centres, you would be able to purchase a box of mixed wildflowers.

Try to have a mixture of perennials, biannuals and annuals with a dominance of perennials – you would want to create an everlasting impact, and you would want something to that comes again year after year without being reliant on you to plant new annuals year-on-year.

When establishing the wildflower plantation, make sure to weed out regularly – especially aggressive and dominant plants, but long-term, the less management you give it, the better and the more biodiverse it becomes and also allows for the annuals to self-seed.   

The UK’s Wildlife Trust offers an index and information about the variety and diversity of wildflowers here. 

Climate-resilient edibles

Growing food locally is no longer just a lifestyle choice; it is a hedge against supply disruption and price volatility, at least in recent global geopolitical crises such as the war in Ukraine and Iran.

Depending on how much time you have on your hands, the effort you put into using your growing space is not only seasonal but also throughout the year.

Hardy species such as kale, chard, spinach, broccoli and cabbage can due to being able to handle large temperature swings and cold spells, suitable for year-round growing.

Broad beans and peas are well suited to Spring sowing. Courgettes and culinary squash are suitable for Spring sowing with late summer and autumn harvesting, respectively. 

Perennial herbs like rosemary, thyme, and sage are not only necessary ingredients in every serious kitchen – they are very hardy once established and offer rich biodiversity values.

These crops require relatively low inputs and can perform well under increasingly unpredictable conditions.

How to handle drought and heat

Rosemary and thyme mentioned above has long been associated with Mediterranean climates and as the northern European climate is rapidly changing they’re steadily becoming relevant further north. As heatwaves intensify across Southern Europe and begin to reshape growing conditions elsewhere, plant selection is adapting.

Adding to rosemary, consider lavender, sedum, succulents, yarrow and echinacea. Not only do these species survive with less water but often support pollinators and improve soil structure.

soil-building choices

Even though healthy soil is the foundation of any resilient system, it is often overlooked in favour of visible planting. By incorporating clover, vetch or other green manures you fix nitrogen naturally, improve the soil structure and increase organic matter. 

Over time, this contributes to processes such as soil carbon sequestration, helping soils retain moisture and store carbon.

From earthflower to ecosystem

What, then, does it mean to mark Earth Day in 2026?

Perhaps it is less about grand gestures and more about informed choices. A patch of wildflowers instead of a lawn. Grow some food yourself and reduce your reliance on imported produce and a volatile world. Care for and pay attention to and understand your soil instead of seeing it as something you need. 

It is a bit of a cliche, but small acts like these are not insignificant, and if enough people do it, a lot of small acts become one giant act.

In a world where climate change is no longer a distant threat but a lived reality, it is no longer whether we act, but how deeply those actions are rooted.

While the Earthflower may be a symbol, what we grow from it is something else entirely and should outlive the 2026 Earth Day, Earth Week and Earth Month.

Anders Lorenzen is the founding Editor of A greener life, a greener world.