Thompson & Morgan Sunflower - Waooh!

Experience the exceptional value and ease of growing with this multi-headed variety, boasting an a...

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This guide is for gardeners of all levels who want to add a vibrant splash of color to their outdoor space with the Thompson & Morgan Sunflower 'Waooh!'. The key benefit is the dazzling display of golden flowers with dark centers that bloom from mid-July to September. Note that while the plant is easy to grow, it requires a sunny location and well-draining soil for optimal results.

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Model Part Number133206
BrandThompson & Morgan

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FAQs

When should I sow the seeds?

Sow seeds indoors in April or outdoors from April to June.

How deep should I plant the seeds?

Bury seeds 13mm (½") deep.

How much sunlight does this sunflower need?

It prefers full sun, at least 6-8 hours of direct sunlight per day.

How often should I water my sunflowers?

Keep the soil consistently moist but avoid overwatering. Check the soil regularly and water when the top inch feels dry.

Can I grow these in containers?

Yes, they thrive in containers. Ensure the container is large enough to support the plant's growth.

What kind of soil do they need?

Cultivate them in well-manured, well-draining soil.

How tall do they grow?

They typically reach heights of 60cm (24") in pots and 60-80cm (24-32") in borders.

What is the RHS Award of Garden Merit?

The RHS Award of Garden Merit is a prestigious award given by the Royal Horticultural Society to plants of excellent garden performance.

Troubleshooting

Seeds not germinating

Ensure the soil is warm and moist. Check the seed packet for the recommended germination time. Consider starting seeds indoors for earlier blooms.

Poor flowering

Make sure the plant is getting enough sunlight. Ensure the soil has sufficient nutrients, and consider using a balanced fertilizer.

Plant wilting

Check the soil moisture level. Water the plant if the soil is dry. Wilting can also be a sign of root rot due to overwatering.

Pests attacking plants

Inspect plants regularly for pests. Use appropriate organic or chemical controls if necessary. Ensure good air circulation to help prevent pest infestations.

Pros and Cons

Pros

  • Easy to grow from seed, making it accessible for beginners.
  • The extended blooming period provides long-lasting color and interest in the garden.
  • Versatile planting options: suitable for borders, beds, and containers.
  • Attracts pollinators, promoting a healthy garden ecosystem.
  • The Award of Garden Merit from the RHS indicates its reliability and quality.
  • The plant's well-formed structure and habit provide an attractive display.

Cons

  • Requires a sunny location for optimal growth and flowering.
  • Consistent watering is needed, especially during dry periods.
  • May require staking or support in windy areas, especially when grown in containers.
  • Like all annuals, it needs to be replanted each year.
  • Susceptible to pests and diseases if not properly cared for.

Setup, Compatibility & Care

  1. Sowing Seeds: Sow seeds directly into moist, warm, weed-free soil or in pots. Bury them 13mm (½") deep.
  2. Location: Plant in a sunny location where they will receive at least 6-8 hours of sunlight daily.
  3. Soil: Cultivate in well-manured soil that is well-draining. Avoid waterlogged conditions.
  4. Watering: Keep the soil consistently moist, especially during dry periods. Avoid overwatering.
  5. Spacing: Thin seedlings to 40cm (16") apart or one per container.
  6. Feeding: Use a balanced fertilizer to support strong growth and flowering. Follow the instructions on the fertilizer packaging.
  7. Compatibility: Compatible with various garden settings, including borders and containers. They pair well with other annuals and perennials that thrive in similar conditions. Ensure the plants don't overshadow each other.
  8. Care: Deadhead spent flowers to encourage further blooming. Monitor for pests and diseases, and take appropriate action if necessary.