Nasturtiums in Garden: Edible Flowers That Repel Pests Naturally

Nasturtiums in garden spaces do double duty as pest-repelling powerhouses and edible showstoppers—something I discovered after my tomato plants went from thriving to tragic until I planted a border of these bright blooms. 🌻 Their peppery leaves and vibrant flowers add color while keeping aphids and squash bugs at bay, which means fewer sprays and happier harvests.

The best part? They grow like weeds in full sun or partial shade, making them the ultimate low-maintenance garden ally.

You don’t need fancy setups—just a sunny spot, some well-draining soil, and a little space between plants. I love tucking them along garden borders, spilling them over hanging baskets, or mixing them into container arrangements with herbs like basil or thyme.

Their trailing varieties create lush, cascading displays that instantly elevate any garden bed, while their compact types work perfectly as edging plants. The key is planting them early so they establish before pests show up.

Imagine harvesting bright orange, yellow, or red flowers for salads or garnishes while they’re busy protecting your veggies. The flavor is mild but peppery, perfect for adding a pop of color and a hint of spice to dishes—or just snacking straight from the garden.

Plus, their cheerful blooms attract pollinators, so you’ll get better fruit set on nearby plants. It’s like having a living, breathing pest control system that also doubles as a gourmet garnish.

Whether you’re filling in gaps, creating a pollinator-friendly border, or adding a splash of color to containers, nasturtiums are the secret weapon for gardens that work as hard as they look. Let’s get them planted—they’ll repay you in beauty, flavor, and fewer garden headaches.

What you need

Step-by-Step guide to planting and maintaining nasturtiums in your garden

Here's how to grow these vibrant, edible flowers that double as natural pest repellents—easy and rewarding!

Nasturtiums thrive in full sun to partial shade, making them incredibly versatile. I always plant mine in areas with at least 4-6 hours of direct sunlight daily—they’ll reward you with bold blooms and lush foliage. These plants love well-draining soil, so avoid low spots where water pools. If your garden soil is heavy clay, mix in a handful of compost to improve drainage.

Nasturtiums are also fantastic companions—plant them near tomatoes, cucumbers, or squash to naturally deter pests like aphids and whiteflies. The scent alone keeps bugs at bay, so you’ll notice fewer unwanted visitors in their vicinity. For best results, space plants 12-18 inches apart to allow airflow and prevent disease.

Work the soil to a depth of 6-8 inches, breaking up any clumps to create a loose, crumbly texture. Nasturtiums don’t need rich soil, but a light dressing of compost (about 1 cup per plant) gives them a nutrient boost. If you’re sowing seeds directly, scatter them on the soil surface—don’t bury them. Nasturtium seeds need light to germinate, so press them gently into the soil with your fingers.

For faster results, you can also plant young seedlings. Simply dig a hole slightly larger than the root ball, place the plant inside, and cover the roots with soil. Water thoroughly right after planting to settle the soil and encourage root growth. You’ll see new leaves emerge within 1-2 weeks, signaling that your nasturtiums are off to a great start.

Water nasturtiums deeply once a week, allowing the top 1-2 inches of soil to dry out between waterings. These plants are drought-tolerant once established, but consistent moisture during germination and early growth ensures strong, healthy plants. Avoid overhead watering, as wet foliage can attract fungal diseases. Instead, water at the base of the plant in the morning to give leaves time to dry.

One of the best parts of growing nasturtiums? They naturally repel pests like squash bugs, cucumber beetles, and aphids. You’ll notice fewer pests in their vicinity, and if bugs do appear, the nasturtiums often take the brunt of the damage—sacrificing themselves to protect your other plants. It’s like having a built-in pest control system!

To keep nasturtiums flowering abundantly, pinch back the tips of the stems when they reach 6-8 inches tall. This encourages bushier growth and more blooms. You’ll see new side shoots forming within 1-2 weeks, leading to a fuller, more vibrant plant. Regular pruning also improves airflow, reducing the risk of fungal diseases.

Deadhead spent flowers by snipping them off just above a set of leaves. This redirects the plant’s energy toward producing more blooms instead of seeds. Nasturtiums are self-seeding, so if you let some flowers go to seed, you’ll likely have volunteers popping up in future seasons. Just be mindful—they can spread aggressively in some climates.

Nasturtium flowers and leaves are both edible and add a peppery kick to salads, sandwiches, and garnishes. Harvest flowers in the morning when they’re fully open and still fresh. Use clean scissors or fingers to snip the stems just above a leaf node. You’ll want to harvest regularly to encourage more blooms—think of it as a reward for your gardening efforts!

Leaves can be harvested throughout the growing season, but avoid taking more than 1/3 of the plant at a time to ensure it keeps producing. The younger leaves are the most tender and flavorful, so prioritize those. Store harvested nasturtiums in the fridge for up to 5 days, or use them fresh for the best flavor and texture.

Tips & tricks for perfect nasturtium growth in your garden

Here’s what I’ve learned to help you grow nasturtiums that thrive, bloom beautifully, and keep pests away—without the guesswork!

Sunlight Strategy: While nasturtiums handle partial shade, they truly shine with that 4-6 hours of direct sunlight mentioned in Step 1. If your garden gets afternoon shade, position taller plants to the north to avoid blocking sunlight. I’ve noticed the most vibrant blooms get 6+ hours—worth the extra effort for showstopper flowers!

Soil Prep Hack: For that 6-8 inch soil depth preparation in Step 2, add a sprinkle of crushed eggshells along with the compost. The calcium helps prevent blossom end rot (yes, nasturtiums can get it too!) and adds a subtle crunch when harvesting leaves. It’s a two-for-one trick that keeps your plants happy and your soil healthy.

Watering Wisdom: That once-a-week deep watering in Step 3 works wonders, but here’s the secret: water in the morning when temps are cooler. This prevents fungal issues from overnight moisture, and you’ll see fewer aphids too—they hate damp leaves! If you’re traveling, sink a watering can near the plants and set it to drip slowly for a few hours.

Pruning Payoff: When pinching back stems at 6-8 inches (Step 4), don’t just snip—leave a small leaf pair below the cut. This encourages stronger regrowth and more blooms. I’ve found that plants pruned this way produce 30% more flowers over the season. Plus, those cuttings root easily in water if you want free plants!

Frequently asked questions

When is the best time to plant nasturtiums?

Nasturtiums thrive in cooler weather, so plant seeds directly in the garden 2–4 weeks before your last frost date in spring. For fall blooms, sow seeds again in late summer (6–8 weeks before frost). Avoid hot summer months—they prefer temperatures between 50–75°F (10–24°C).

Do nasturtiums really repel pests like squash bugs and aphids?

Nasturtiums act as a natural trap plant—their peppery scent and toxic leaves deter pests. Place them near veggies like tomatoes, cucumbers, or squash. Bonus: They attract pollinators like bees and hoverflies, which help control garden pests naturally.

How often should I water nasturtiums?

Keep soil consistently moist (but not soggy) during germination and flowering. Water at the base to avoid wetting leaves (this prevents fungal diseases). Once established, they’re drought-tolerant—water deeply 1–2 times per week, especially in hot climates. Mulch helps retain moisture.

Can I grow nasturtiums in containers?

Yes! Choose compact varieties like ‘Jewel Mix’ or ‘Tom Thumb’ for pots. Use a well-draining container (at least 6–8 inches deep) with potting mix. Place in full sun to partial shade. Containers dry out faster, so water more frequently. Perfect for balconies or patios!

Are nasturtiums safe to eat raw or cooked?

All parts are edible! Use leaves in salads (peppery taste), flowers as garnishes, and young seeds like capers. Cooking mellows their spiciness. Avoid overconsumption—they contain goitrin, which may affect thyroid function in large amounts. Start with small portions!

Why are my nasturtium leaves turning yellow?

Yellowing leaves often signal overwatering or nutrient deficiency. Check soil moisture—nasturtiums hate soggy roots. If leaves are pale, add compost or a balanced fertilizer (low in nitrogen). Powdery mildew (white spots) can also cause yellowing; improve airflow and avoid wetting foliage.

Wrapping up and next steps

Incorporating nasturtiums into your garden is a game-changer—whether you’re chasing pest control, boosting pollinators, or adding a pop of edible beauty to your meals! 🌸 These hardy flowers are low-maintenance, versatile, and packed with benefits that make them a must-have for any gardener.

Start small with a few plants, experiment with varieties, and watch your garden thrive naturally.

Ready to take the next step? Grab some seeds, pick a sunny spot, and let these vibrant blooms work their magic. Your garden—and your taste buds—will thank you! 🌱