Petunia Seeds

Petunia Seeds FAQs 

Take a look at some of the frequently asked questions we receive from those looking to buy Petunia Seeds in the UK. You can contact our Customer Service Team or browse our general FAQs for further advice.   

When to sow Petunia Seeds 

Petunia seeds are best sown indoors from January to March. Early sowing allows plants plenty of time to develop before being planted outdoors after the last frosts, resulting in a long season of colourful blooms throughout summer. 

How to grow Petunias from seed 

Petunia seeds are very small and should be sown on the surface of moist seed compost without covering them, as they require light to germinate. Place seed trays in a warm, bright location and keep the compost consistently moist. Once seedlings are large enough to handle, transplant them into individual pots and continue growing them on in a frost-free environment. Harden plants off before planting outdoors after all risk of frost has passed. Petunias thrive in fertile, well-drained soil and a sunny position. 

How long does it take for Petunias to flower? 

Petunias typically begin flowering around 10 to 14 weeks after sowing, depending on the variety and growing conditions. Once established, they flower continuously from early summer until the first autumn frosts, providing months of vibrant colour. 

Why grow Petunias from seed? 

Growing petunias from seed is a cost-effective way to produce large numbers of plants for beds, borders, containers, hanging baskets and window boxes. They are valued for their long flowering season, wide range of colours and patterns, and their ability to create spectacular summer displays. 

Where can you grow Petunias? 

Petunias are extremely versatile and can be grown in borders, raised beds, patio containers, hanging baskets and window boxes. They perform best in a sunny, sheltered position with fertile, well-drained soil. Regular watering and feeding throughout the growing season will help maintain strong growth and abundant flowering. 

Which Petunia variety should I choose? 

The best petunia variety depends on where you plan to grow it. Trailing varieties are ideal for hanging baskets, window boxes and containers, while compact bush varieties are perfect for bedding displays and edging borders. Petunias are available in an enormous range of colours, including white, pink, red, purple, blue, yellow and striking bi-colours, making them suitable for almost any garden style. 

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