Try to avoid overhead watering to prevent mildew. Watch for signs of powdery mildew on the leaves, usually in late summer. They come in a wide range of colors, bloom all summer long, and they are so easy to grow Even beginner. Cutting encourages the production of new flowers and seems to stimulate the plants for greater vigour. Zinnias are a summer garden staple for good reason. Zinnias are notoriously delicate plants, so it’s important to wait until all danger of frost has passed before planting them. This ensures that the nights are warm enough, and the seeds still have enough time to germinate and grow before the hot summer weather arrives. ![]() Take regular cuttings of Zinnia stems to enjoy indoors, starting mid-summer right into the fall. The best time to sow them in the ground is from late May to early June. Just cover Zinnia seeds, and aim for a final spacing of 25-30cm (10-12″) between plants.ĭepending on the variety, it takes about two months after sowing for the first flowers to appear. They require full sun which means at least six hours of direct. ![]() Maintain a soil temperature of 21-26☌ (70-80☏). The biggest obstacle to growing zinnias successfully indoors is providing enough light. Zinnias don’t transplant well, but can be started indoors, if necessary, in peat or coir pots, 6-8 weeks before planting out. Continue reading below for tips on how to grow Zinnia from seed.ĭirect sow after last frost. Feed once in early spring, and again once flowering has begun. Water regularly, keeping leaves as dry as possible. Pinch off growing tips early in the season for bushier growth. Plant Zinnia seeds in average, well-drained garden soil, but dig in a generous amount of well-rotted manure the previous fall. Plant after the last frost date and be sure to give them space crowding encourages disease. They can be planted in the spring throughout Florida and also in the fall in South Florida. Thin to 40cm apart after seedlings have sprouted, making sure not to uproot any staying behind.There’s no mistaking the colour and stature of annual Zinnias. Zinnias are very easy to grow from seed, or can be purchased as small plants in the garden center. Sow seeds directly in the ground and cover with a thin layer of soil. Rake well to create a crumbly bed for the seeds. Choose a sunny site in garden borders, or where you can sow a row or two for cutting, such as in your raised garden bed ideas. If you're direct sowing seeds in the ground as your chosen method for how to grow zinnias, do so from the end of spring (around May) onwards. Toilet roll tubes or newspaper pots allow you to do this without upsetting them. Sow two zinnia seeds to a pot or module, then thin out the weakest seedling to leave the strongest of the pair. As long as they have room to roam they will be happy, but if they seem to be outgrowing their space it's time to pot them on. Avoid the temptation to sow earlier than this as you want sturdy and compact plants not leggy specimens that will struggle. If you're sowing zinnia seeds indoors, sow them in any good seed compost at the beginning of spring and transfer to a heated propagator, sunny windowsill or find a suitable spot in your greenhouse ideas. Prefer to know how to grow zinnias from seed? Zinnia seeds sown straight into the soil outside are less prone to being attacked by disease but seeds sown indoors or also have a good chance of flourishing. There's more climbing plant support ideas in our feature. When they’re about 45cm tall, nipping out the main buds encourages them to branch out and grow bushier. Zinnias are half hardy and won’t like cold night time temperatures so don't be tempted to plant them out too soon.Īs they develop, support the tall varieties with canes and string or with pea and bean netting stretched horizontally. Once the risk of frosts has passed it's time to plant them up in good garden soil or compost containing John Innes No 2. Just be aware that mail-order plug plants can be shaken up in the post, and end up getting bruised which can lead to problems with diseased plants.Ĭarefully unpack your plug plants and keep them in indoors until needed. ![]() It's also a good option if you don’t have the space needed for how to grow flowers from seeds at home. You can buy zinnias as plug plants, which is ideal if you want to learn how to grow zinnias and get off to a flying start at the beginning of the growing season.
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