![]() Thin to 40cm apart after seedlings have sprouted, making sure not to uproot any staying behind. 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. To get your seeds to sprout into zinnia seedlings they’ll need lots of sunlight, so place them in a spot that gets sun all day long. ![]() Make a small hole, only about 1/4 inch deep, drop a seed in, and cover very lightly. Toilet roll tubes or newspaper pots allow you to do this without upsetting them. Get some seed trays and add soil, or use pots that can later be transplanted directly into soil. 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. Transfer the plant from the small container to the ground (just like you would if you had purchased the plant from a garden center). 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. Gradually move the containers to full sun, rain, and the rest of the elements so it is hardened to the elements. 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. Remember to provide the plants with lots of sun and keep the soil moist. 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. Growing zinnias in pots allows you to brighten porches and decks with these cheerful flowers.
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