If you suffer from hay fever, the idea of spending more time in the garden probably feels counterintuitive. But the plants in your garden are only part of the picture, and some of them aren't causing the problem you think they are.
The majority of hay fever in the UK is triggered by grass pollen (affecting roughly 90% of sufferers), followed by tree pollen and then weed pollen. The Met Office pollen forecasts for the southeast consistently show that Surrey's pollen season has been starting earlier and lasting longer over the past decade, which aligns with the broader warming trend. For gardeners, this means the window of discomfort is wider than it was twenty years ago.
But here's the useful distinction: most garden plants don't cause hay fever. The biggest offenders are wind-pollinated species that release vast quantities of lightweight pollen into the air. Insect-pollinated plants, which make up the majority of what we plant in garden borders, produce heavier, stickier pollen that doesn't travel far. Understanding this difference is the starting point for designing a garden that's both beautiful and liveable for allergy sufferers.
The worst offenders in Surrey
Birch trees are the most significant tree pollen source in the southeast. They release pollen from late March through May, and a single birch catkin produces millions of pollen grains. Silver birch (Betula pendula) is extremely common across Surrey, both in gardens and in the wider landscape. If you have severe tree-pollen allergy, a birch in your garden is worth considering for removal, though you should be aware that birch pollen travels for miles, so your neighbour's tree may be as much of a factor as your own.
Grass is the dominant allergen for most people and the hardest to avoid in a garden setting. Grass pollen peaks in June and July across the southeast. The main culprits are common grasses: ryegrass, timothy, and meadow fescue. Your lawn is literally a pollen source, and mowing disturbs it into the air. If your allergy is primarily grass-related, mowing is often the single worst activity for triggering symptoms.
Plane trees (London plane, Platanus x hispanica) are common as street trees across Surrey towns. They release pollen in April and May and also shed fine hairs from their leaves and seed balls that irritate airways even in people without classic hay fever.
Oak and ash release pollen in April and May and are abundant across the Surrey countryside. Their pollen contributes to the tree pollen peak that hits before the grass season begins.
Weed pollen (dock, nettle, plantain, mugwort) causes a later-season peak from late June into September. These are wind-pollinated and common in unkempt areas, roadside verges, and neglected garden corners.
Plants that are fine for most allergy sufferers
Insect-pollinated plants produce pollen that's too heavy to become airborne in significant quantities. This includes the vast majority of flowering garden plants:
Roses, geraniums, hydrangeas, dahlias, clematis, peonies, foxgloves, delphiniums, lavender, salvia, heuchera, hellebores, Japanese anemones, and most bulbs (daffodils, tulips, alliums, snowdrops) are all low-risk choices.
Shrubs including rhododendrons, camellias, viburnum, and mahonia are insect-pollinated and generally well tolerated.
Fruit trees (apple, cherry, pear, plum) are also insect-pollinated. While they do produce pollen, it's not the type that typically triggers hay fever. If you're severely sensitive, standing directly under a cherry tree in full bloom might be uncomfortable, but having one in the garden is generally manageable.
A note on ornamental grasses: These are widely used in modern garden design (including by us) and some do release pollen. Most ornamental grasses used in UK gardens flower late in the season and produce relatively little airborne pollen compared to lawn grasses. Miscanthus, Stipa, and Calamagrostis are generally well tolerated. If you're highly sensitive to grass pollen, it's worth discussing specific varieties with us.
Garden design strategies that reduce exposure
Beyond plant choice, how the garden is structured makes a significant difference.
Reduce lawn area. This is the single most effective change for grass-pollen sufferers. Replace some or all of your lawn with gravel, paving, planted borders, or ground-cover plants (thyme, chamomile, Soleirolia). A smaller lawn means less pollen production and less mowing. If you keep a lawn, let someone else mow it, or mow in the evening when pollen counts are lower.
Position planting with wind in mind. In Surrey, the prevailing wind comes from the southwest. If you have trees or hedges that release pollen, their pollen will travel predominantly to the northeast. Position seating areas and outdoor living spaces upwind of any known allergenic planting where possible.
Use hedges as pollen barriers. A dense, evergreen hedge filters airborne pollen from outside the garden. Yew, Portuguese laurel, and privet all form effective barriers. Research from the RHS and others has shown that hedges can reduce pollen penetration by a meaningful amount, particularly at ground level where people sit.
Create sheltered seating. Pollen concentrations are highest in open, breezy areas. Enclosed or partially enclosed seating areas (walled gardens, courtyard spaces, pergolas with climbing plants) have lower pollen levels than exposed ones. Combine this with the prospect-and-refuge principle (feeling sheltered while still having a view) and you get a space that's both comfortable and low-allergen.
Water features help. Moving water traps and settles pollen particles from the air around it. A fountain or small water feature near a seating area creates a localised zone of cleaner air. This isn't a cure for severe hay fever, but it contributes to the overall approach.
Choose female plants for dioecious species. Some trees and shrubs have separate male and female plants. Males produce pollen; females don't (though they may produce fruit or berries). Holly, for example, is dioecious. A female holly produces berries but no pollen. If you're specifically managing for allergies, this distinction is worth knowing when selecting plants.
Practical tips for allergy-prone gardeners
Time your gardening. Pollen counts are typically highest between mid-morning and early evening. Early morning (before 9am) and evening (after 6pm) are the lowest-risk windows. Overcast, damp days are better than hot, dry, windy ones.
Change clothes and shower after gardening. Pollen sticks to fabric and hair. Coming indoors and sitting on the sofa in the same clothes you gardened in brings pollen into the house.
Don't dry laundry outside during peak pollen season. Sheets and towels act as pollen collectors. If you have a pollen allergy and your washing is out on a high-count day, you're sleeping in pollen.
Wear wraparound sunglasses. They reduce the amount of pollen reaching your eyes. Not glamorous, but effective.
Keep car windows closed when driving through rural Surrey in June. The grass pollen from field margins and roadside verges is the worst exposure many people experience.
Designing your garden around your allergies
If you're planning a garden project and allergies are a factor, mention it early. It's something we can design around without compromising the quality or appearance of the garden. Low-allergen gardens aren't sparse or boring. They're gardens where the plant choices are made with an additional criterion in mind.
We've designed gardens across Surrey for clients with various sensitivities, and the result is always a space that's as beautiful as any other, just more comfortable to spend time in.
Talk to us about designing a garden that works for you, allergies and all. Or read more about how we approach garden planning and design, including how we tailor planting to individual needs.
For more on preparing your garden for the season ahead, including practical timing advice, see our guide to spring garden prep in Surrey.
