Nasturtiums Without Bare Roots: Starting These Annuals Successfully

Nasturtiums Are Grown From Seed, Not Bare Roots

If you are planning a first run of nasturtiums and wondering where to buy bare-root plants, this is the article that will save you time, disappointment and money. Nasturtiums are tender annuals, which means they live out a single growing season rather than coming back year after year from a dormant root system. Bare-root planting is a technique for plants sold or stored dormant: roses, fruit trees, peonies, daylilies, and other woody or herbaceous perennials whose roots can be lifted, cleaned and replanted in the dormant season. Nasturtiums do not enter that kind of dormancy, and they are not sold that way. Their roots are soft, fleshy and short-lived, and they depend on active top growth to keep functioning.

The right starting point for nasturtiums is seed. Once you accept that, the equipment you buy becomes much more useful and more interesting: it changes not just how the plants arrive but how quickly they grow, how large they get, and how the display looks through the season. Below is an honest assessment of what nasturtiums need, why bare-root planting is not part of it, and which growing equipment genuinely improves the experience.

Why Nasturtiums Do Not Move As Bare Roots

Bare-root planting relies on a plant's ability to survive with soil removed from its roots, usually while it is dormant. The plant is lifted, shaken free of soil, transported, and then rehydrated and replanted before growth restarts. Roots remain alive and capable of taking up water in that dormant stage, but they can withstand a period of dry storage.

Nasturtiums (Tropaeolum majus and its hybrids) are fast-growing tender annuals. Their stems are succulent, their roots are fine and fleshy, and their whole life cycle depends on continuous moisture and active growth. Once lifted and dried, the roots lose viability very quickly. A bare-root nasturtium offered for sale would either be dead already or die within days of planting.

This has practical consequences:

• Buy nasturtiums as seed, not as dormant roots.
• Choose the seed packet like a plant selection: trailing, dwarf or climbing habit matters more than the colour on the front.
• Plan to sow where the plants will grow, or start them in plugs shortly before the last frost.

If a supplier lists nasturtiums among bare-root or dormant-root plants, that is a sign the listing is confused or poorly described. Trust seeds instead.

What Nasturtiums Need To Germinate And Grow

Nasturtium seeds are large and easy to handle, which is good news for beginners. The key conditions are warmth, moisture and light. A reliable method is:

• Sow directly outdoors after the last expected frost, when the soil has warmed.
• Soak the seeds for a few hours before sowing to soften the coat.
• Plant each seed about 1–2 cm deep, spacing them according to the packet for the variety.
• Keep the soil consistently moist until germination.

If you start seeds indoors, use individual cells or small pots rather than trays, because nasturtium seedlings resent root disturbance. Sow two to three weeks before the last frost, then transplant the plugs outdoors once the weather settles. They will not take kindly to being dug up and moved after that.

Equipment That Changes The Grow

Because nasturtiums start from seed, the products that matter are the ones that get seeds into strong plants and keep them growing well. These are the categories that make a real difference to a nasturtium project.

Seed-starting cells and modules

Nasturtium seedlings develop quickly and dislike being cramped or transplanted late. A modular seed-starting tray with individual cells lets each seed form its own root ball, so you can lift the whole plug without disturbing its neighbours. Deep cells are better than shallow ones because the seed is large and the roots want room to descend. This is the most worthwhile upgrade over a shared tray or a reused food container.

Thermostatically controlled propagators

Nasturtium germination is fastest in warm soil. A heated propagator with a thermostat holds a steady temperature and removes the guesswork from indoor sowing. The benefit is even, early, reliable germination, rather than a bench full of seeds that appear at wildly different times. If you have a warm, consistent windowsill, you can sow without a propagator, but a heated unit gives a more predictable result in a cool room.

Moisture-retaining seed compost

Fine seed compost that holds moisture evenly matters more than a rich, fertile mix at this stage. Nasturtium roots are sensitive to drying out, and a compost that stays evenly moist reduces the risk of stalled seeds. Use a specific seed and cutting compost rather than garden soil or a heavy multipurpose mix.

Liquid feed for the trailing varieties

Nasturtiums are famously tolerant of poor soil, and overfeeding them produces leaves at the expense of flowers. If plants are growing in containers where nutrients run out mid-season, a light, occasional liquid feed keeps growth steady. The aim is not to push plants hard, but to prevent container plants fading. Choose a balanced feed and dilute it more than the label rate for flowering annuals, then judge by the plants.

Climbing supports

Trailing and climbing varieties look best when given something to climb. A simple obelisk, trellis or wire frame lifts the display off the ground, reveals the flowers, and protects the growing tips. For balconies and patios, a lightweight support that fits the pot matters more than a large garden structure.

Self-watering containers

In warm weather, nasturtiums in small pots dry out quickly. A self-watering container with a water reservoir smooths this out and gives the plants more consistent moisture, which supports steady growth. For anyone who is away during the day or grows on a sunny balcony, this is a genuine improvement over a standard pot.

Choosing Variety For The Display You Want

Nasturtium seed packets are where the real planning happens. The habit of the variety matters more than the colour:

• Dwarf or compact varieties suit small pots, window boxes and the front of borders.
• Trailing varieties spill over container edges and look best when allowed to hang.
• Climbing varieties need a support and carry flowers up against a wall or trellis.

Mix a compact variety in a pot with a trailing one for a fuller display. Read the final spacing and height on the packet and match it to your container rather than cramming.

Pests, Flowers And The Edible Question

Nasturtiums are often grown as a companion plant and are visited by aphids and caterpillars. Check plants regularly and, where a control is needed, use a targeted method rather than a broad approach. Their bright, trumpet-shaped flowers are long-lasting and appear most freely in full sun with moderate moisture.

The flowers and young leaves of nasturtiums are commonly used in salads and garnishes. If you want to use them, grow plants specifically for that purpose, avoid pesticide treatments, wash the leaves and flowers before use, and check the plant has not been exposed to anything unsafe. Do not assume any ornamental plant is edible without confirming the species and part.

Planting, Not Replanting

The most useful thing you can do for nasturtiums is skip the bare-root question entirely. Sow seed, give each plant its own cell or space, and choose container and support equipment that matches the habit of the variety. The purchases that change the experience are the ones that get seed started evenly and keep roots moist through the season, because the plants will do the rest from there.