Gardeners across Australia are being reassured that it is not too late to sow nasturtium seeds for a vibrant summer display. Despite the season being well underway, these hardy annuals can still be planted to provide a burst of colour and edible flowers well into autumn.
Why Nasturtiums Are a Summer Staple
Nasturtiums (Tropaeolum majus) are beloved for their bright, cheerful blooms in shades of orange, yellow, and red, as well as their round, lily-pad-like leaves. They are incredibly easy to grow, thriving in poor soil and requiring minimal water once established. Their flowers and leaves are also edible, adding a peppery zest to salads.
According to gardening experts, nasturtiums are ideal for summer sowing because they germinate quickly and grow rapidly. Seeds can be sown directly into the ground or in pots, and they will typically flower within 6 to 8 weeks. This means that even if sown now, they will provide colour from late summer through to the first frosts.
How to Sow Nasturtium Seeds
To sow nasturtiums, choose a sunny spot with well-drained soil. Soak the seeds overnight in water to soften the hard seed coat, which speeds up germination. Plant the seeds about 2 centimeters deep and 30 centimeters apart. Water gently and keep the soil moist until seedlings emerge, usually within 7 to 14 days.
Once established, nasturtiums are drought-tolerant and require little care. They can be grown as ground cover, in hanging baskets, or trained up a trellis. Deadheading spent flowers encourages more blooms, but leaving some to seed will ensure self-sowing for next year.
Benefits Beyond Beauty
Nasturtiums are not just ornamental; they are also beneficial for the garden. They act as a trap crop for aphids, drawing pests away from other plants. Their bright flowers attract pollinators like bees and butterflies, supporting local biodiversity.
For those looking to add a splash of colour to their summer garden, nasturtiums are a low-effort, high-reward choice. As one horticulturist notes, "It's never too late to plant nasturtiums. They're forgiving, fast-growing, and bring joy to any space."
