Climbing Nasturtium Seeds: How to Grow Trailing and Climbing Nasturtiums Successfully
Climbing nasturtium seeds produce fast-growing, trailing or scrambling plants that are ideal for covering trellis, fences, arches, and walls. Unlike bush varieties, climbing nasturtiums spread widely and can reach impressive lengths, making them perfect for vertical interest, wildlife-friendly gardens, and edible planting schemes.
⭐ Recommended Products — 🌿 Nasturtiums & Growing Essentials
⭐ Recommended Products — Garden & Allotment Essentials for March
March is when the growing season truly begins. Seeds are being sown daily, beds are prepared and late frosts are still possible — these essentials help produce strong plants and a successful start.
Seed Trays, Modules & Propagation Kits — perfect for tomatoes, brassicas, lettuce, onions and flowers. 👉
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Heated Propagators, Heat Mats & Grow Lights — improves germination and prevents leggy seedlings during cold nights. 👉
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Seed & Cutting Compost — essential for healthy seedlings and strong root growth. 👉
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Garden Fleece & Plant Protection Covers — protects seedlings, potatoes and early plantings from late frost. 👉
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Spring Vegetable Seeds — carrots, beetroot, peas, spinach and salads can all be started now. 👉
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Garden Kneeler & Seat — makes long sowing and planting sessions far more comfortable. 👉
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Pressure Washer (Greenhouse & Patio Cleaning) — clean patios, paths and greenhouses before planting. 👉
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Solar Garden Lights — perfect for enjoying the garden during brighter spring evenings. 👉
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Nasturtiums are cheerful, edible flowers with bright colours and peppery taste — easy to grow in beds, containers, and hanging baskets.
• Nasturtium Seed Collection (Mixed Colours)
A mix of vibrant nasturtium seeds — perfect for sowing directly outdoors or under cover early in the season.
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• Nasturtium Plug Plants / Young Seedlings
Healthy young nasturtium plants ready to transplant into borders or containers for instant summer colour.
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• Well-Draining Flower & Annual Compost
Light, nutrient-balanced compost ideal for nurturing nasturtium roots and encouraging healthy growth.
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• Grow Lights for Early Sowing
Bright LED grow lights that help keep indoors-sown nasturtiums strong and stocky before planting outside.
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• Decorative Pots & Planters for Nasturtiums
Attractive containers that show off nasturtium blooms on patios, balconies, or windowsills.
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Easy to grow and highly productive, climbing nasturtiums are suitable for beginners and thrive in a wide range of garden conditions.
What Are Climbing Nasturtiums?
Climbing nasturtiums are not true climbers with tendrils, but vigorous trailers that scramble through other plants or can be gently tied into supports. They produce long, flexible stems, rounded leaves, and brightly coloured flowers in shades of orange, red, yellow, and cream.
All parts of the plant are edible, including the leaves, flowers, and seeds.
Popular Types of Climbing Nasturtium Seeds
Common climbing and trailing varieties include:
- Tall trailing nasturtiums
- Cascading nasturtiums for walls and fences
- Nasturtiums suited to arches and trellis
- Varieties bred for long vines and heavy flowering
Seed packets often describe them as “climbing,” “trailing,” or “tall” nasturtiums.
When to Sow Climbing Nasturtium Seeds
Climbing nasturtiums are frost tender and should be sown after winter has passed.
- Sow indoors: March to April
- Sow outdoors: April to May
Seeds usually germinate within 7–14 days in warm conditions.
How to Sow Climbing Nasturtium Seeds
Indoor Sowing
- Sow seeds individually in small pots
- Push seeds about 2cm deep into compost
- Water gently
- Place in a bright, frost-free location
Outdoor Sowing
- Sow directly where plants will grow
- Ensure soil has warmed
- Protect young seedlings from slugs
Soaking seeds overnight can speed up germination.
Where to Grow Climbing Nasturtiums
Climbing nasturtiums grow best in:
- Full sun
- Light or moderately fertile soil
- Free-draining ground
Avoid rich soil, as this encourages leaf growth at the expense of flowers.
They are ideal for:
- Trellis and arches
- Fences and walls
- Raised beds
- Large pots and containers
How Tall Do Climbing Nasturtiums Grow?
Most climbing nasturtiums grow:
- 1.5 to 3 metres long, depending on variety and conditions
Regular tying-in helps direct growth and prevents stems from sprawling.
Growing Climbing Nasturtiums in Pots
Climbing nasturtiums perform very well in containers if given support.
Tips for pot growing:
- Use large pots with drainage holes
- Avoid high-nutrient compost
- Add a trellis or cane support early
Trailing varieties also work well in hanging baskets.
Watering and Feeding
Climbing nasturtiums are low maintenance.
- Water regularly while young
- Once established, water sparingly
- Do not feed with fertiliser
Overfeeding reduces flowering and weakens growth.
Do Climbing Nasturtiums Need Support?
Yes. While they don’t climb naturally, they benefit from guidance.
Support options include:
- Garden canes
- Trellis panels
- Netting
- Fences
Stems can be loosely tied using soft garden ties.
Flowering and Growth Period
Climbing nasturtiums usually flower:
- From June or July
- Through to October or first frost
Deadheading encourages continuous flowering.
Edible Uses of Climbing Nasturtiums
All parts are edible:
- Leaves: Peppery, ideal for salads
- Flowers: Mild, decorative, slightly sweet
- Seeds: Can be pickled and used like capers
Regular harvesting encourages fresh growth.
Do Climbing Nasturtiums Self-Seed?
Yes. If seed pods are left on the plant:
- Seeds drop naturally
- New plants may appear the following year
Self-seeded plants often grow vigorously.
Common Problems With Climbing Nasturtiums
Lots of Leaves, Few Flowers
- Soil too rich
- Too much shade
Weak or Floppy Growth
- Lack of sun
- Overwatering
Aphids
Nasturtiums attract aphids, acting as a useful trap plant to protect other crops.
Are Climbing Nasturtiums Good for Wildlife?
Yes. They are excellent for wildlife-friendly gardens.
They:
- Attract pollinators
- Provide shelter
- Support beneficial insects
They are often used in companion planting schemes.
Are Climbing Nasturtiums Suitable for Beginners?
Absolutely. Climbing nasturtiums are:
- Easy to grow from seed
- Fast-growing
- Low maintenance
- Highly productive
They are ideal for new gardeners and allotments.
Final Thoughts on Climbing Nasturtium Seeds
Climbing nasturtium seeds offer an easy way to add height, colour, and edible interest to your garden. With minimal care, they quickly transform vertical spaces and reward growers with months of flowers and foliage.
Whether trained up supports or allowed to trail naturally, climbing nasturtiums are a versatile, reliable choice for any garden.