How to Grow Nasturtiums in a Short Growing Season

The real reason I grow nasturtiums is that my mother-in-law always had them growing on her deck. I loved seeing those cheerful blooms spilling out of pots and containers, and they quickly became one of my favourite flowers—especially since my own parents never grew them!

This year, I ordered the Tip Top Alaska Mix from West Coast Seeds and can’t wait to direct sow them soon. I also have a few started indoors from seeds I saved from last year’s plants. I’m especially drawn to the variegated varieties, but honestly, I love them in every colour.

Nasturtiums are one of those easygoing, annual flowers that don’t ask for much, which makes them perfect for beginners or busy gardeners. Whether you’re growing them for their bright, nostalgic blooms, as a companion plant, or just because they bring you joy, here’s what you need to know to get started.

Bright orange nasturtium flowers bloom among round green leaves in a garden bed. The vibrant petals contrast sharply with the lush foliage, creating a lively and colorful natural scene.

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How to Plant Nasturtiums

You can either direct sow nasturtiums or start them indoors about 4–6 weeks before your last frost. They’re very forgiving and easy to grow.

To improve germination, I like to nick the seeds gently with my fingernail before planting—this process is called scarification. If that sounds uncomfortable, a small file works just as well. (But please don’t hurt yourself!)

For direct sowing, plant the seeds about 6 inches apart.

And that’s it. They’re pretty chill and don’t need much fussing over! You really don’t need to overthink nasturtiums.

Bright orange nasturtium flowers with green, round leaves grow over the edge of a wooden garden bed, surrounded by tall green plants in the background.

Growing Conditions

Nasturtiums prefer full sun, but they’ll tolerate a bit of shade if that’s what you’ve got.

One fun thing I’ve discovered is that their size will match the space you give them. If you grow them in a small pot, they’ll stay compact. But if you plant them in a raised bed or directly in the ground, they can get surprisingly large and lush!

A garden bed filled with lush green leaves and vibrant orange nasturtium flowers, set outdoors with soft sunlight and greenery in the background.

FAQs About Growing Nasturtiums

What are the benefits of growing nasturtiums?

Besides being beautiful, nasturtiums are a great companion plant. I use them as an intentional trap crop for flea beetles. Mid-summer, the beetles will usually go after the nasturtiums and leave my other crops alone. If you struggle with flea beetles on plants like broccoli, kale, or radishes, nasturtiums can be a helpful addition to your garden plan.

Where’s the best place to plant nasturtiums?

I like to tuck them along the edges of my raised beds so they can trail over the sides—it’s such a pretty effect. But if you prefer, you can train them to grow up a small trellis instead. Either way works beautifully.

A woman in a floral dress and sunhat stands smiling in a garden beside a bed of orange flowers, with a greenhouse and trees in the background on a sunny day. — FUN FACT: *Nasturtiums are more than just a pretty face—they’re edible too! The flowers have a lovely peppery flavour and look gorgeous in salads. They’re also incredibly easy to save seeds from!*

Anything I missed? Let me know in the comments!

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