![]() High-quality, sterile seed-starting potting mix is an essential ingredient for the success of your baby zinnia seedlings. You only need a few items to successfully start zinnia seeds indoors to get a jump start on the season. What Equipment Do I Need To Start Zinnias Indoors As they get used to the harsher conditions of garden life, I gradually expose them to more sun and wind for about a week prior to planting in the garden. I usually start by placing my plants in a partially-shaded patio. After the seedlings develop their first set of true leaves, remove the humidity dome to allow the plants to acclimate to drier air and the real world.īefore transplanting healthy zinnia seedlings into the garden, you need to let the plants ‘harden off’ by slowly getting them acclimated to outdoor conditions. I prefer the taller humidity domes for zinnias because the grow quickly taller than the smaller domes that come with most common seed starting kits available from big box stores. These clear domes come in a couple of different heights. ![]() To encourage faster germination, use a humidity dome to cover the seed tray to maintain a high humidity environment. However, LED lighting technology has advanced to the point where high-efficiency LED grow lights are available to anyone interested in starting seeds indoors. Cool white shop lights have been used with great success for years. You have a few options for low-cost grow lights for seed starting. While you can use a sunny window to grow a handful of zinnia seedlings in your kitchen, you will have better results growing your seeds under artificial lighting. Lots of gardeners use peat pots because they allow the gardener to plant the seedling in the biodegradable pot without disturbing the roots. I personally use larger cell packs or individual pots to allow the plants to grow a little bigger before transplanting. Cell-packs, peat pots, or soil block cubes are all suitable containers to start zinnia seeds indoors. You have several options for containers for starting your zinnia seeds. Use a high-quality seed starting mix that is sterile to prevent damping off and other soil-borne diseases. Start plants two to four weeks before your last spring frost. Zinnias transplant well and can be started early indoors to get a jump start on the season. Zinnias can be started in seed trays and cell packs indoors.
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