Best Biennial Flower Seeds of 2026
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Biennial flower seeds refer to a type of plant that completes its lifecycle over two years, producing flowers and seeds in the second year. These seeds are a popular choice for gardeners looking to add a touch of colour to their outdoor spaces. They come in a variety of colours and sizes, and can be planted in both spring and autumn. Biennial flowers are known for their hardiness and ability to thrive in a variety of conditions, making them a great choice for both novice and experienced gardeners alike.
At a Glance: Our Top Picks
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9.8
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9.7
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9.5
Top 10 Biennial Flower Seeds
Mr Fothergill's Seeds Canterbury Bells Cup & Saucer
Mr Fothergill's Canterbury Bells is a hardy biennial flower that blooms in the year after sowing, offering a reliable display for your garden. Its unique cup and saucer shaped blooms make it ideal for adding charm to borders and for cutting, so you can enjoy fresh flowers indoors. As a cottage garden favourite, it provides early colour, brightening your outdoor space. Plus, it's easy to grow, making it suitable for gardeners of all levels who want a beautiful and low-maintenance addition to their garden.
Johnsons 20621 Flower Seeds, Canterbury Bells Cottage Mixed
Thompson and Morgan Sweet Rocket Seeds
Sweet Rocket Seeds from Thompson and Morgan promise a delightful springtime display with their large lilac and purple flower spikes. These attractive blooms not only enhance your garden's beauty but also invite butterflies and beneficial insects, supporting local wildlife. You will appreciate the sweet and spicy scent that fills the air each evening, creating a lovely atmosphere. This hardy biennial can even become perennial in some soils, allowing you to enjoy their elegance year after year.
Mixed Colours Foxglove Seeds by Pretty Wild Seeds
The Foxglove Seeds by Pretty Wild offer fresh seeds that are perfect for your garden. Being a Defra registered seller, you can trust the quality of these seeds. Each packet is pictorial, which makes it easy for you to identify the seeds and plan your planting. Additionally, the full sowing instructions included ensure you know exactly how to cultivate your flowers for the best results.
Mr Fothergill?s Seeds Ltd 20756 Mr Fothergill's Sweet William Electron
Mr. Fothergill's Elegant White Foxglove Seeds
Mr. Fothergill's Foxglove Seeds offer a beautiful addition to your garden. As a hardy biennial, these seeds will produce stunning flowers the year after sowing, providing you with elegance and charm. The cool white spires are perfect for the back of shady borders, enhancing the visual appeal of your outdoor space. Additionally, these flowers attract bees and butterflies, making them a delightful choice for supporting local wildlife. Standing at 120 cm tall, they create a striking presence in any garden setting.
10,000 Seeds Papaver rhoeas Wild Flower Seeds
The Pretty Wild Seeds Poppy offers a generous supply of approximately 10,000 fresh seeds, making it an excellent choice for gardeners looking to create a vibrant display. You can sow these seeds in either Spring or Autumn, ensuring flexibility in your planting schedule. Each packet includes full sowing instructions, providing you with the guidance needed for successful growth. These professional seeds are sourced from the UK, guaranteeing quality and suitability for local climates.
Common Evening Primrose Flower Seeds by DAMAVAND PRO
The DAMAVAND PRO Evening Primrose Seeds produce large, vibrant lemon-yellow flowers that bloom at night, adding beauty to your garden from dusk until dawn. These seeds are perfect for creating moon gardens or attracting nighttime pollinators. Additionally, the plant has a long history as a medicinal herb, with its leaves and roots being used to create soothing oils and teas for various health issues. As a fast-growing biennial, it thrives in full sun and well-drained soil, making it easy to care for.
Premier Seeds Direct Hollyhock Chater's Double Mixed
The Premier Seeds Hollyhock offers an easy way to grow beautiful flowers in your garden. Germination takes just 14-21 days, so you can enjoy quick results. You will need to maintain a soil temperature of at least 65°F for optimal growth. The planting depth is a mere 1/16 inch, making it simple to sow directly into pots or trays. With a height of 6-7 feet, these plants will thrive in full sun, adding a stunning visual appeal to your outdoor space.
Mr Fothergill's Dwarf Double Mixed Marigold Seeds
Mr Fothergill's Marigold Seeds are a fantastic choice for gardeners looking to add vibrant colour to their outdoor spaces. These half hardy annuals bloom in the same year they are sown, ensuring you can enjoy flowers all summer long. They thrive in various weather conditions, making them easy to grow regardless of the season. You can create stunning bedding, border, and patio displays that not only beautify your garden but also attract beneficial bees and butterflies.
Frequently Asked Questions (FAQs)
1. What are biennial seeds?
Biennials are seedlings one year, flower and set seed the next year. Although their life cycle is two years, you will find that they appear continuously in your garden. The seedlings of the second year becoming the flowers of the next year and so on.
2. What is one example of a biennial plant?
biennial, Any plant that completes its life cycle in two growing seasons. During the first growing season biennials produce roots, stems, and leaves; during the second they produce flowers, fruits, and seeds, and then die. Sugar beets and carrots are examples of biennials. See also annual, perennial.
3. Do biennials self seed?
After flowering, lots of biennials will self-seed themselves around, ensuring you always have them popping up in your garden. The trick is to deliberately sow your biennials for two years running to ensure you enjoy their flowers every summer, and not every alternate summer.
4. Is it too late to sow biennials?
In general, biennials are sown in late spring or early summer, so they have a generous amount of time to bulk up before flowering the following year. Sow them each year to ensure you have a regular supply to plant out in the garden, or in containers.
During our biennial flower seed research, we found 175 biennial flower seed products and shortlisted 10 quality products. We collected and analyzed 18,342 customer reviews through our big data system to write the biennial flower seeds list. We found that most customers choose biennial flower seeds with an average price of £2.68.
The biennial flower seeds are available for purchase. We have researched hundreds of brands and picked the top brands of biennial flower seeds, including Mr Fothergills, Johnsons, Thompson & Morgan, Pretty Wild Seeds, DAMAVAND PRO.
Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.