Plant Partners: Creating a Thriving Garden with Less Work

Super-Plant to the rescue: Marigolds really are every gardens best friend

With our warm wet winters, and stress-inducing dry summers, helping fungal, disease and insect attacks flourish on our favourite plants - keeping an attractive and productive garden can be a real challenge.    This is where turning to traditional methods such as Companion Planting can pay real dividends, saving time and effort, as well as reducing chemical use.

Companion planting is, quite simply, the practice of growing different plants together, that naturally  benefit one another. It works by mimicking natural ecosystems – where plants coexist in balanced relationships. Some plants repel harmful insects or fungal diseases, others attract beneficial predators, and many improve soil conditions by fixing nitrogen or providing shade.

Understanding – and using - these relationships can boost resilience, increase yields, reduce chemical use and create more dynamic gardens: your garden thrives, with less 'work'.

Marigolds act to protect precious bedding plant displays

 Some great combinations you can use in ornamental borders include;

Roses and Salvias

Salvias are excellent companions for roses, not just visually – the sulphur in the salvia’s leaves means that when they warm up, they release a natural fungicide – which helps keep mildew and blackspot (common fungal infections) at bay.

Marigolds with Bedding Plants

Marigolds (Tagetes) are what we might call a super-plant: their strong aroma (including limonene and pyrethrum), masks the scents of other plants nearby – confusing and repelling aphids and mosquitos. Underground their roots secrete a chemical that repels harmful soil-borne root-knot nematodes.  Finally, their bright flowers attract beneficial insects such as lacewings and ladybirds, that feed on unwanted pests.

Tulips and Alliums

Less commonly known - Alliums’ (onion species) scent can deter animals such as deer, helping protect nearby tulips. These can be any allium, from the ornamental to the common herb Chive (Allium schoenoprasum).

Roses and Lavender

Lavender helps deter aphids on rose, whilst the silvery foliage and purple flowers create a classic, elegant pairing.

Hostas and Ferns

In shaded areas, these plants thrive together - the foliage of ferns acting as a blanket to help maintain humidity around hostas and other neighbours.

Nasturtiums as Living Mulch

The trailing and ground covering habit of Nasturtium (Tropaeolum) naturally suppresses weeds and their flowers attract pollinators, making borders more dynamic and lively. They can also act to lure aphids and blackfly away from food crops.

Companion Planting in Edible Gardens

Edible gardens are where we more traditionally think of using companion planting - as a powerful productivity tool:

Tomatoes and Basil

As well as being natural culinary partners, the strong scent of Basil (Ocimum) helps repel aphids, white flies and some nematodes. As a lower-growing plant, planting Basil under taller tomatoes also maximises the space you have and acts an living mulch.

Carrots and Onions

The strong scent of edible Onions (Allium cepa) will deter carrot flies from infesting your Carrot (Daucus carota) crop, while carrots do not compete heavily with onions for nutrients.

The “Three Sisters” – Corn, Beans, Squash

This is a classic combination: Corn (Zea mays) provides structure, Beans fix nitrogen from the air into the soil(an essential nutrient for all), and the under-planted Squash (Curcurbita) shades the soil, reducing weeds and moisture loss.

Lettuce with Taller Crops such as Sweetcorn

Lettuce benefits from partial shade provided by neighbours, extending its growing season by preventing it from bolting (and becoming inedible).

And – of course – there is the super-plant: Marigold.

Why not have a go and see what works for you

There is no single perfect mix, because conditions vary. However, the key ingredients for a resilient and attractive planting commonly include:

• A structural plant                     (e.g., Tomatoes, Sunflowers or Roses)

• A pest-deterring herb               (Salvias (sages), Lavender, Basil, Rosemary)

• A pollinator-friendly flower        (e.g.,Marigold, Nasturtium)

• A soil-supporting plant (e.g., Beans, Clover)

• A ground cover or living mulch plant (Nasturium, Basil, Clover)

It is certainly worth trying ‘known’ pairings, whilst experimenting with new ones.

The true goal of companion planting is not perfection but partnership — designing gardens where plants help each other thrive, and where beauty and function grow side by side.

Practical and beautiful: A mixed planting of kale, cavolo, beans and artichoke - mixed with marigolds, sunflowers and verbena.

If you would like some professional advice to help to transform your garden into a space that brings you joy everyday, do get in touch: info@vickylincolngardendesign.com.