Nasturtiums are a total triple threat: they look gorgeous, they’re incredibly low-maintenance, and they’re a legit superfood. If you ask me, every home garden needs them! If you’re ready to get some in the ground, here’s everything you need to know about getting those seeds to sprout.
The Quick Essentials
Before you start sowing your nasturtium seeds, there are a few things to keep in mind to ensure your garden thrives. Keep an eye on these factors:
- The plant’s growth habit (climbing vs. mounding)
- Finding the right spot
- Soil quality
- Giving them enough elbow room
- Protecting them from frost
These are the big keys to success when growing this unique plant. Let’s dive into the details!
How Long Does Germination Take?
Under the right conditions—ideally between 60°F and 65°F (15-18°C)—nasturtium seeds usually take about 10 to 20 days to germinate. If you’re eager to get a head start, you can start them indoors on a sunny windowsill as early as March. Just tuck the seeds into some good potting mix about half an inch to an inch deep. Make sure to keep the soil consistently moist while you’re waiting for those first sprouts to pop up.
If you’re planting directly in the garden, wait until those warm May days arrive. Frost is nasturtium’s biggest enemy! Pick a spot with full sun or partial shade, but make sure to give them plenty of space. Depending on the variety, these plants can get pretty bushy or vine out quite a bit.
Creating the Perfect Environment
The secret to great nasturtiums is actually in the soil—but maybe not in the way you’d think. If you want a massive explosion of colorful flowers, you actually want soil that is a bit “lean” (lower in nutrients). Whatever you do, don’t over-fertilize! If the soil is too rich, the plant will put all its energy into growing big green leaves and forget to grow flowers. That would be a bummer, especially since the flowers are totally edible and add a delicious, peppery kick to any dish.
The Bottom Line: Fast Sprouts, Big Results
Nasturtiums are a massive win for any home gardener. They’re a tasty superfood, a treat for the eyes, and—best of all—they’re practically foolproof. With a short germination time, you’ll be enjoying everything this plant has to offer before you know it.
