A 5-10-5 works fine. French Marigolds will provide a non-stop show of dense, 1½"-2" Carnation-like double flowers in shades of yellow, orange or reddish-brown from early summer until late fall if the spent flowers are removed promptly. Mulching will help to prevent the weeds and to conserve soil moisture. You can start seeds indoors, about 6 to 8 … We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. It takes about six to eight weeks from the time of the germination of a marigold seed to produce a plant that is large enough to transplant outside. Marigold seeds germinate in five to 14 days depending upon soil conditions and temperature. For advice from our Horticultural reviewer on how to deadhead your marigolds so they produce more flowers, read on! How to Plant Marigolds French marigolds can easily be started from seed, while African marigolds are best purchased as young plants (when started from seed, they can take a long time to flower). You can grow them throughout the year, but the best time is always the transition between winters to summer. As long as you plant them in areas of full sun, they should be particularly trouble-free plants. For advice from our Horticultural reviewer on how to deadhead your marigolds so they produce more flowers, read on! The seedlings need to be about eight to 18 inches apart in your garden, so make sure to plant the seeds accordingly, and then gi… Marigolds attract butterflies! Newer varieties and other species are less prone to this. Peel open the bottom shell just beneath the petals to expose the small, rod-like seeds. Next, cover the ground around the flowers with mulch to prevent weeds and keep the soil moist. Optimum temperature for the germination of seeds is 19°C. Plants readily germinate from seed and can be sown in situ or in trays and then transplanted at a later date. Marigolds are tolerant of dry, sandy soil, but they do not grow well in overly damp soil. Soil Marigolds have no particular soil requirements. Heirloom seeds are most likely to grow plants that closely resemble the parent plant, although even plants grown from heirloom seeds will differ somewhat from the parent plant, as the seeds are obtained from open pollination and are not clones of one another. However, if the weather gets too hot, marigolds won't bloom, and you can't do much about that. Thin your marigolds when they’re a few inches (7.5 to 13 cm.) Do marigolds need a lot of outdoor sunlight? Marigolds are very easy to start from seed. This article has been viewed 231,890 times. If your final frost date is late, you’ll really benefit from planting marigold seeds indoors 4 to 6 weeks before the last frost. And don't overlook marigolds in container gardens, as the smaller varieties do well in containers. Right now, I'm just doing the marigolds. Remove any sticks, stones, or debris from the soil. Try to avoid using a garden hose to water your plants. Thank you! Signet marigolds (T. tenuifolia) often flower in just 60 days, depending on the variety. Sign up to get all the latest gardening tips! Sprinkle the marigold seeds over the potting mix. 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Marigold plants are easygoing plants that bloom reliably, even in direct sunlight, punishing heat and poor to average soil.Though they are beautiful in the ground, growing Marigolds in containers is a surefire way to enjoy this delightful plant. All they really demand is plenty of sunlight. It's also a good idea to dilute your fertilizer more than the package recommends. Short ones don't need it until you remove the dead flowers. Single marigolds are also known as signet marigolds. Marigolds are very easy to grow and are available in a variety of colors, including white, yellow, orange, red, and mixed colors. Prepare the soil by digging down about 6 inches to loosen and aerate it. Why did my marigolds’s leaves change to red color? If you choose to start from seed indoors, you can begin the process about 2 months before the last expected frost. Hybrid varieties will not usually start from seed. Short varieties should be spaced a foot (0.5 m.) apart, and tall varieties should be 2 to 3 feet (0.5 to 1 m.) apart. Decrease to 10 hours per day over the second month. The marigolds are Perineal or Annual flowers. They’re low maintenance, they’re fast-growing, they repel pests, and they’ll provide you with bright, continuous color until the fall frost. Approved. Marigolds have a very strong herbal scent. They will bloom from mid-summer all the way until frost. Make sure your beds or containers have adequate drainage; you can add a layer of gravel to the bottom and cover it with soil before planting to enhance draining. Marigolds thrive on a 20-10-20 (20% nitrogen, 10% phosphorus, and 20% potassium) fertilizer. If you’re starting indoors, sow the seeds in a well-draining, rich soilless growing medium in a warm place. of more medium. In this case, 84% of readers who voted found the article helpful, earning it our reader-approved status. Start your plant at 12 hours of light per day. When all chance of frost has passed, you can transplant your marigolds outside. Tagetes Asteraceae Marigold 'Tangerine Gem'Marigold 'Lemon Gem' Temperature Germination: 22°C Growth: 24°C Light Marigolds do best with plenty of light. Although some gardeners swear that marigolds repel animals, including rabbits, deer, and snakes, there is no evidence to suggest that this is true. If you live in Zone 8 or higher, your marigolds may not die off during the winter and will probably return with fuller vigour the following spring. Last Updated: March 29, 2019 If possible, plant your marigolds on a cloudy day or in the morning; this will help prevent further transplant shock to the plants from the heat. … "Insects have been eating my marigolds to the ground. This article was co-authored by Katie Gohmann. The damp newspaper usually isn't necessary for germinating marigold seeds. Plant them near windows for the best enjoyment. Growing Marigold Flowers – Sowing seeds indoors. 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