Those not devoured by songbirds and deer can be harvested if you wish. Most sunflowers will begin to fade by the end of September. You'll notice lovely blooms, deep flowering colors, and thick, heavy sunflower seeds. In August, your sunflowers will approach full maturity. Most sunflower cultivars mature in around three months-and the first frost can occur in late September or early October in many U.S. July is the last month to sow new sunflower seeds, says Meager. Plant new sunflower seeds every week in June for longer-lasting coverage and more bees. That way, you'll have a continued barrage of colorful flowers throughout the season. Even if you planted some sunflowers in May, plant more in June. You can also safely transplant your baby sunflower plants outdoors at this time. You can also begin germinating your sunflower seeds indoors in May.Įarly June is arguably the best time for sowing sunflower seeds directly into the soil. Also, get the young plants used to being outdoors by acclimatising them before transplanting them into the garden.Late May is the perfect time to sow your sunflowers directly in your garden soil in many parts of the U.S. This avoids the peat pot taking up water meant for the plant. If you use peat pots, tear off the top part of the pot when you transplant them. Otherwise, start the seeds indoors in the usual small pots. Grow sunflowers from seed directly in your garden if you can. Otherwise, make sure to water the young plants regularly and give them time to recover. Fix itĪlthough sunflowers, in general, don’t need fertilising, consider adding some slow-release fertiliser to the soil if it’s poor quality. Transplanting disturbs the roots of the small plants at the time when the roots are using their limited energy to re-establish themselves in the new ground. Recently transplanted young sunflowers can suffer transplant shock. If it’s the stalk that’s drooping, make sure the plant is well watered and consider tying the stalk to a stake to give it support to remain upright. Most people will start their sunflower plants inside, and the seedlings can struggle to get the proper amount of sunlight if they’re left sitting on a windowsill. One of the most common factors that can cause this is insufficient sunlight. Tie the head to a fence or other support to ease the strain on the stalk. Sunflower seedlings can begin to fall over for a few different reasons. When the seed head is mature, the seeds can be harvested, at approximately 120 days from planting. When in full bloom, the flower heads are fertilized by bees and other pollinators, and then seed production begins. As long as the stalk isn’t splitting under the weight, the plant is alright. With proper planting and care, most mammoth sunflowers will bloom at about 90 days from germination. The flower head becomes heavier as it grows and the stalk cannot support the weight of the growing flower. If your sunflower plant is healthy and not yet mature and the flowers are still drooping, it may be because of the variety of sunflower you’re growing. Do some sunflowers droop more than others? However, if the whole plant is leaning over under the weight of the head, you can use a bamboo cane to stake the main stems to keep them upright. You can’t prevent the head from dropping – this is a great sign that your sunflower growing has been successful. This drooping is natural and signifies that the seeds will soon be ready to harvest. As they bloom and the seeds develop, the flower naturally becomes heavy and even the strongest stalk may not be able to hold that load upright. If you’re sure that you’re watering your sunflower enough, it may be drooping as part of its natural life cycle.
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