Some flowers demand constant attention. Others give you a spectacular display for a few weeks and then disappear.

Zinnias are different.

These brilliantly coloured annuals are easy to grow from seed, flower for months, make superb cut flowers and can turn an ordinary sunny border into something spectacular.

From fiery oranges and scarlet reds to soft pinks, lime greens and creamy whites, there’s a zinnia for almost every planting scheme.

If you’ve never grown them before, here are seven reasons they deserve a place in your garden.

1. They Produce an Incredible Amount of Colour

Zinnias aren’t shy.

Their flowers come in an extraordinary range of colours, including:

• Pink
• Red
• Orange
• Yellow
• White
• Purple
• Lime green
• Multi-coloured combinations

Plant several varieties together and you’ll get a wonderfully exuberant cottage-garden effect.

Alternatively, choose one or two complementary colours for a more sophisticated display.

Either way, very few annuals provide this much visual impact from such inexpensive plants.

2. They’re Ridiculously Easy to Grow From Seed

You don’t need to buy trays of mature plants.

Zinnias are straightforward to raise from seed, making them an excellent choice if you’re filling a large border on a budget.

In cooler climates such as the UK, they can be started under cover in spring and planted outside once the danger of frost has passed.

You can also sow outdoors once the soil has warmed sufficiently.

Zinnias dislike cold conditions, so don’t rush them outside too early.

3. Cutting the Flowers Encourages More

Here’s one of the best things about growing zinnias:

You don’t need to feel guilty about cutting them.

Regularly removing flowers prevents the plant from putting all its energy into seed production and encourages continued flowering.

That means you can cut bunches for the house while helping maintain the garden display.

If you don’t want flowers indoors, simply deadhead fading blooms regularly.

The more consistently you remove finished flowers, the longer the display can continue.

4. They Make Fantastic Cut Flowers

If you’ve ever wanted your own cutting garden, zinnias are an ideal place to begin.

Their strong stems and intensely coloured flowers look fantastic in arrangements.

Tall varieties are particularly useful for cutting.

Grow several plants together and you can harvest fresh bouquets throughout summer without stripping the garden bare.

Zinnias also combine beautifully with:

• Cosmos
• Dahlias
• Ammi
• Sunflowers
• Snapdragons
• Ornamental grasses

A small patch can provide an impressive amount of material for the vase.

5. Bees and Butterflies Love Them

Zinnias aren’t only attractive to people.

Their flowers can also attract bees, butterflies and other pollinating insects.

For maximum wildlife value, include single or semi-double varieties with visible centres.

Very densely double flowers may be harder for some pollinators to access.

Mixing different flower forms gives you spectacular ornamental blooms while still providing accessible feeding opportunities for insects.

On a warm summer day, a large patch of zinnias can become remarkably busy.

6. They Keep Going Into Late Summer

This may be their greatest advantage.

By August, some gardens begin looking tired. Early-season perennials have finished and certain summer displays are starting to fade.

Zinnias can be hitting their stride.

Provided they’re healthy and regularly deadheaded, plants can continue producing flowers through late summer and into autumn until cold weather finally brings the display to an end.

That makes them brilliant for filling the notorious late-summer colour gap.

7. There’s a Zinnia for Almost Every Sunny Garden

Not all zinnias are enormous.

Depending on the variety, you can find plants suitable for:

• Patio containers
• Window boxes
• Border edges
• Cottage gardens
• Cutting gardens
• Large flower beds

Compact varieties create colourful low displays, while tall varieties provide height and masses of stems for cutting.

The important requirement is sunshine.

Give zinnias a warm, bright position and they’ll reward you far more generously than plants struggling in shade.

The Simple Trick for Bushier Zinnias

Want more flowering stems?

Try pinching young plants.

Once a healthy young zinnia has developed several sets of leaves, removing the central growing tip encourages side shoots to develop.

Instead of producing one dominant stem, the plant becomes bushier.

More branches potentially mean more flowering stems later in the season.

If you’re growing tall varieties specifically for cutting, this simple technique can dramatically change the shape of the plant.

Give Them Plenty of Sunshine

Zinnias love warmth.

Choose the sunniest reasonable position available—ideally somewhere receiving several hours of direct sunshine each day.

A warm, sheltered location can be particularly useful in cooler climates.

Plants grown in excessive shade may become stretched and produce fewer flowers.

Sunshine also helps foliage dry after rain, which can reduce the damp conditions that encourage some fungal diseases.

Don’t Crowd Them Together

It’s tempting to cram young zinnia plants together because they initially look small.

Resist.

Good airflow around the foliage is valuable, particularly because zinnias can be susceptible to problems such as powdery mildew.

Follow the spacing recommended for your particular variety.

Within a few months, those small seedlings can become surprisingly substantial plants.

Water the Soil, Not the Entire Plant

Zinnias need adequate moisture while establishing and during prolonged dry weather.

But avoid constantly soaking the foliage.

Direct water towards the soil around the roots rather than spraying the entire plant whenever possible.

Watering more thoroughly but less superficially can also encourage roots to explore deeper into the soil.

Container-grown plants will need checking more frequently because pots dry much faster than garden beds.

The One Thing Zinnias Really Hate

Cold, permanently soggy conditions.

Zinnias are warm-season plants and perform best in free-draining soil.

Don’t plant them into heavy waterlogged ground and expect spectacular results.

If your garden has very heavy soil, containers or raised beds filled with a suitable growing medium can provide an easier alternative.

And remember: frost will finish them.

They’re annuals, so enjoy the display while it lasts.

Can You Save Zinnia Seeds?

Yes.

Towards the end of the season, allow some healthy flowers to mature and dry rather than deadheading everything.

Once completely dry, seeds can be collected and stored somewhere cool and dry for sowing the following year.

There’s one interesting catch.

Seeds collected from hybrids may not produce plants identical to their parents. You could end up with different colours or flower forms.

For many gardeners, that’s part of the fun.

Try Planting Them in Groups

One lonely zinnia is pretty.

Twenty together can be spectacular.

Rather than scattering individual plants randomly throughout the garden, try planting them in generous groups or drifts.

Repeated colours create a much stronger visual effect and can make inexpensive seed-grown plants look like a professionally designed display.

For maximum drama, plant several shades of the same colour together.

Final Thoughts

Zinnias offer almost everything you could want from a summer annual.

They’re inexpensive to grow from seed, available in extraordinary colours, excellent for cutting and capable of attracting pollinating insects. Better still, regular picking and deadheading can keep the flowers coming through the latter part of summer.

Give them warmth, sunshine, reasonable spacing and adequate water without leaving them permanently soggy.

Then start cutting flowers.

Because with zinnias, taking a bouquet indoors doesn’t necessarily mean sacrificing your garden display.

It can help encourage the next one.