How Long for Nasturtiums to Flower: Fastest Varieties & Soil Tricks for Early Blooms

If you're planting nasturtiums this spring, you might be wondering how long it takes for them to flower—because 60 days can feel like an eternity when you're eager to enjoy their vibrant 🌼 colors and edible leaves.

The good news? With the right variety and care, you can see flowers in as little as 4-6 weeks after planting.

I’ve tested different nasturtium types and growing conditions, and the fastest bloomers like 'Alaska' or 'Tom Thumb' often surprise gardeners by pushing through early—especially in warmer climates like USDA Zone 6a.

But timing isn’t just about luck. Soil quality, sunlight, and even spacing play a big role in speeding up those first blooms. Too much nitrogen, for example, can delay flowering, while the right balance of phosphorus actually encourages faster blooms.

Let me show you exactly how to tweak your approach for earlier nasturtium flowers.

Whether you're growing them for salads, pollinators, or just colorful borders, understanding these tricks will help you enjoy your nasturtiums sooner—without sacrificing their hardiness or beauty.

Fastest nasturtium varieties that bloom in 4-8 weeks (with growing tips)

If you're impatient to see vibrant nasturtium blooms in your garden, you're in luck—some varieties burst into color in as little as 4 weeks under ideal conditions.

The key lies in choosing the right fast-flowering types and creating perfect growing conditions. Tom Thumb and Alaska are top performers, but even slower varieties can be pushed to bloom earlier with the right tricks.

Most gardeners expect nasturtiums to flower between 60-90 days from seed, but with direct sowing in warm soil and full-sun placement, you can cut that timeline nearly in half.

The varieties I’ve tested most consistently for speed include Jewel Mix, Empress of India, and Dwarf Jewel, which all deliver blooms in 4-8 weeks when grown aggressively.

Here’s the secret: Nasturtiums flower fastest when they’re planted in well-draining, slightly poor soil (they dislike rich compost) and receive at least 6 hours of direct sunlight daily. Avoid over-fertilizing—too much nitrogen delays blooming and encourages leafy growth instead.

For the fastest results, start seeds indoors 2-3 weeks before your last frost date and transplant outdoors once soil temperatures reach at least 60°F. Tom Thumb and Dwarf Jewel are my top picks for containers—they’ll flower in just 4-5 weeks if given enough light.

Place them in south-facing windows or on patio edges where they’ll get maximum sun.

One common mistake gardeners make is planting nasturtiums in rich, fertile soil. These plants thrive in lean, sandy conditions—think of them as the opposite of tomatoes.

Amend your soil with sand or perlite if it’s heavy clay, and avoid compost-heavy mixes. The less nitrogen, the faster they’ll produce flowers instead of leaves.

Temperature also plays a critical role. Nasturtiums flower fastest when daytime temps are between 70-80°F. If you’re in a cooler climate, opt for Alaska Mix or Jewel Mix, which tolerate slightly lower temperatures better than heat-loving varieties like Empress of India.

Always plant after your last frost date to avoid cold damage.

Spacing is another game-changer. Crowd your plants closely—they’ll flower faster when competing for light. In garden beds, space them 8-12 inches apart, but in containers, you can pack 3-4 plants per 6-inch pot. The closer they grow, the sooner they’ll reward you with blooms.

Pro tip: If you’re eager for color, try succession planting. Sow a new batch every 2 weeks from spring to early summer. This ensures a continuous display of blooms all season long, with the first batch flowering in 4-6 weeks and later plantings following suit.

Remember, nasturtiums are self-pollinating, so you’ll get flowers even if you don’t have bees around. But if you want to boost pollination, plant them near b