Zinnia Seeds

Zinnias are an excellent choice for long-lasting summer colour, perfect for brightening any flower garden. Our Zinnia seeds are carefully selected for strong germination and healthy, vigorous plants that flower for months.

You can enjoy deep red and golden-yellow flowers for bold, eye-catching displays, impacting borders and containers. If you prefer something softer, you can find varieties with creamy white petals, adding contrast and variety. These half-hardy annuals cope well with dry spells and flower from early summer through to the first frost.

With excellent disease resistance, these flower seeds are a dependable choice for brightening up your garden this year – all you have to do is sow them and enjoy. Browse our full range of Zinnia seeds and find the perfect plants for you at D.T. Brown.

When to Plant Zinnia Seeds

Sow Zinnia seeds indoors from March to May or directly outdoors from late April to June. If starting indoors, use trays with fine compost and keep them in a warm, bright location. Harden off seedlings before transplanting once the risk of frost has passed. For direct sowing, wait until the soil has warmed and space Zinnia seeds evenly in well-drained soil. Germination takes around a week in ideal conditions.

How to Grow Zinnia Seeds

Sow Zinnia seeds thinly onto the surface of moist, well-drained soil, covering lightly with compost. Keep the soil damp but not waterlogged, as excessive moisture can cause rot. Once seedlings develop true leaves, thin them to allow at least 30cm between plants for good air circulation. Zinnias thrive in full sun and tolerate dry conditions well, making them ideal for summer borders. Deadhead regularly to encourage continuous flowering and remove any faded blooms. Avoid overfeeding, as excessive nitrogen can lead to weak stems. With minimal care, zinnias will flower from early summer until the first frost.

Buy Zinnia Seeds From Zinna Seeds

At D.T. Brown, we only offer the highest-quality Zinnia seeds. All of our seeds and flower plants are carefully selected for the strongest growth and the brightest colours because we believe that your garden deserves the very best. Order today for fast UK delivery, starting from just £2.45, and grow with confidence – 100% satisfaction guaranteed.