Coriander seeds have hard shells, so germination is generally slow. Even with broken shells, coriander seeds usually take about 7-10 days to sprout. So, are there any techniques for quick seedling growth? How to raise coriander seeds well? Let's find out together.
How to Quickly Raise Coriander Seeds?
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Seed Selection: Choose fresh seeds that are mature, plump, have high germination rates, no mold, and are shiny. In terms of variety, prioritize high yield, strong aroma, low fiber, resistance to bolting, good quality, and strong disease resistance.
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Seed Treatment: Before sowing coriander, split the seeds in half with a tool to crack the shells and open the fruit of the seeds. Then soak the seeds in a 1% potassium permanganate solution or a 50% carbendazim wettable powder solution at a ratio of 300 times for 30 minutes. After soaking, remove and rinse the seeds, then soak them in clean water for about 20 hours. Place them in a cool place at 20-25°C to promote germination. Sow the seeds when about 30% of them turn white.
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Timing of Sowing: Although coriander can be planted throughout the year, it is best to sow in March-April in spring and September in autumn. The climate conditions at these times are more conducive to seed germination and growth.
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Sowing Methods: Sowing methods include broadcasting and row sowing. When broadcasting, ensure even distribution by mixing seeds with sand before sowing, then cover with a thin layer of soil. For row sowing, dig furrows in the bed, with a depth of 2-3 cm, then sow the seeds and cover the furrows, pressing down to prevent seeds from being washed away by rain. Make sure to water the bed thoroughly before sowing.
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Seedling Management:
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Thinning: When coriander grows to 4-5 cm, thin the seedlings in a timely manner, removing weak seedlings and leaving strong ones of uniform size to promote even growth.
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Weeding: Since coriander seedlings grow slowly while weeds grow rapidly, proper weeding is essential. Use appropriate herbicides like pendimethalin or bensulfuron-methyl before coriander seedlings emerge.
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Watering and Fertilizing: Water coriander seedlings moderately, about once every 3-4 days during the seedling stage. Apply quick-acting fertilizers, combined with watering and foliar application.
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Disease Prevention: Coriander seedlings have weak resistance to diseases, so disease prevention is crucial. Common diseases include aphids, leaf spot, etc. Focus on preventive measures and daily management to enhance the seedlings' disease resistance.
In conclusion, for quick coriander seedling growth, it's essential to choose high-quality seeds, properly treat them, and manage them before and after sowing. Following these steps will help cultivate high-quality seedlings.