Dahlias grow best with 6 to 8 hours of direct sunlight. For best results, choose a spot that gets full sun from the morning through midday. Try to find a spot that will also provide partial shade from intense afternoon light, especially if you live in a hot climate.  If you keep your dahlia indoors, you’ll need to supplement sunlight with fluorescent plant lights. You’ll also need supplemental lighting if you’re starting your plant indoors in early spring. Set the light about 6 inches (15 cm) above the top rim of the pot for newly planted tubers and raise the light as the plants grow. Give them a thorough watering 2 or 3 times a week. Dahlias growing in hot, dry climates may need daily watering. While you should water thoroughly and keep the soil moist, the soil shouldn’t be soggy or waterlogged. Use twine or nylon string to secure the stalk to the stake. As the stalk grows, tie it to the stake in 1 foot (30 cm) intervals. Go for a liquid fertilizer with higher concentrations of phosphorus and potassium. Good N-P-K combinations include 8-24-16 and 0-20-20.  Higher amounts of phosphorus promote blood production, and potassium encourages root development. Apply your product according to its label’s instructions. Flowers last 4 to 6 days, then fade and die. Clip spent flowers as you see them to encourage further bloom production. Remove the bottom leaves by the middle of summer, or around mid-July in the Northern Hemisphere.  Pinch back the tips before flower buds form when the plant is about 16 inches (0.41 m) tall to encourage a bushier growth. Removing the bottom leaves improves air circulation, which reduces the risk of mildew. Dahlias are prone to a number of pests, including mold, earwigs, slugs, spider mites, aphids, and cucumber beetles. To prevent infestation and infection, apply a combination insecticide and miticide every 7 to 10 days once the plant grows to a height of 6 inches (15 cm).  Find a chemical insecticide and miticide labelled for flowering plants at your local garden center. Apply your product as directed. Use organic insecticides, such as horticultural soap or neem oil, for a more natural approach. The first freeze will kill the plant’s leaves and stalk. When this happens, cut the stalk to a height of 6 inches (15 cm). Allow 2 weeks for the tuber to harden in the pot, then carefully dig it out of the pot. Rinse it, let it air dry for a day, then pack it in paper, sawdust, or perlite. Store the tuber in a dry, dark place that’s 40 to 50 °F (4 to 10 °C) during the winter, then replant it in the spring.
أبقِ الأصيص في الشمس الكاملة. اسقِ البصلات بعمق بمجرد امتداد الساق أعلى حافة الأصيص. اربط الساق بوتد عندما يبلغ ارتفاعه 30 سم. سمد الأزهار مرة كل أسبوعين خلال موسم الإزهار. قلّم النبات وأزل الأزهار الميتة للمساعدة على النمو الصحي. رش نبات الأضالية بمبيد فطري أو مبيد حشري حسب الحاجة. احفظ البصلة في مكان بارد وجاف خلال الشتاء.