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Best Plants & SeedsThompson & Morgan (2026)

1 plants & seeds matching brandThompson & Morgan, hand-picked from UK Amazon listings.

Not sure which one to pick? Read our Best Plants & Seeds UK (2026) guide.

Thompson & Morgan Sunflower Russian Giant Seeds

#1 Pick

Thompson & Morgan Sunflower Russian Giant Seeds
Rated 4.6 out of 5 stars (342)
  • Pollinator Garden

£3.99

Pros

  • Giant variety can reach up to 10 feet tall
  • Popular with families and pollinator gardeners
  • Easy to grow from seed outdoors

Cons

  • Tall stems may need staking in exposed spots
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Thompson & Morgan are renowned British growers specialising in high-performing vegetable seeds and a wide selection of award-winning flower plants. Their catalogue offers exceptional quality, often resulting in impressive displays for both experienced gardeners and beginners alike. Focusing on heritage varieties alongside modern hybrids, Thompson & Morgan cater to diverse tastes and growing conditions across the UK.

This collection represents a curated selection from their extensive range, encompassing everything from robust salad leaves and juicy tomatoes to vibrant bedding plants and fragrant perennials. The seeds are typically sown directly into the ground or trays for later transplanting, while the plants offer a variety of sizes and shapes suitable for various garden layouts – from small patios to larger allotments.

Thompson & Morgan’s success stems from meticulous breeding programs and a deep understanding of UK climate conditions. Their catalogue reflects this expertise, providing growers with a reliable source of exceptional seeds and robust plants designed to thrive in British gardens. Please refer to Amazon UK listings for specific details on each product's growing requirements.

FAQ

What soil types do Thompson & Morgan seeds generally need?

Most Thompson & Morgan vegetable seeds benefit from well-drained, fertile soil enriched with compost. Flower seeds often prefer slightly lighter soils, but a general all-purpose seed starting mix is suitable for many varieties.

How much sunlight do these plants typically require?

The sunlight requirements vary depending on the specific plant. Generally, vegetables need at least 6 hours of direct sunlight per day, while flowering plants often prefer partial shade, particularly during the hottest parts of summer.

When should I sow Thompson & Morgan vegetable seeds?

Sowing times depend heavily on the variety and your local climate. Check the individual product descriptions on Amazon UK for specific sowing recommendations – typically spring or autumn for different vegetables.

Do Thompson & Morgan plants require regular feeding?

Regular feeding is beneficial, especially during periods of rapid growth. Use a balanced liquid fertiliser diluted to half strength every 2-4 weeks, following the product instructions on Amazon UK.

What’s the best way to protect young seedlings from pests?

Protecting seedlings involves regular inspection and early intervention. Consider using organic pest control methods like netting or insecticidal soap, as detailed in the individual product listings on Amazon UK.

Are Thompson & Morgan seeds genetically modified (GM)?

No, all Thompson & Morgan seeds are non-GM. They focus on traditional breeding techniques to create high-performing varieties suitable for UK gardens.

What’s the typical germination rate for Thompson & Morgan seeds?

Germination rates vary depending on sowing conditions and seed quality. It's recommended to sow a slightly larger number of seeds than needed to account for potential losses – check Amazon UK listings for more specific guidance.

How do I prepare my garden bed before planting Thompson & Morgan plants?

Ensure your soil is well-drained and free from weeds. Dig in plenty of organic matter, such as compost or well-rotted manure, to improve fertility and structure – see product details on Amazon UK for specific soil pH recommendations.

Can I grow Thompson & Morgan plants indoors before transplanting?

Some varieties can be started indoors under controlled conditions. Refer to the individual seed packet instructions on Amazon UK or the plant’s description for specific guidance regarding light and temperature requirements.

What are the main differences between the flower seeds and plants offered by Thompson & Morgan?

The seed range focuses on annual flowers, while the plant range includes perennials and shrubs. Consider your garden's size, sunlight conditions, and desired bloom times when selecting from either category – detailed information can be found on Amazon UK’s product pages.