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Tips for Growing Dahlias

Plant dahlia tubers when the ground temperature is about 60 degrees. This is mid April or May. Plant in an area that is sunny for most of the day. In exceptionally hot climates, afternoon shade is desired. Soil should be loose for good drainage. If the soil is heavy, add some sand or peat moss to lossen the soil and improve drainage. PH should be 6.5-7.5. Bone meal can be added at planting time. Dig a hole about 4-6 inches deep and lay the tuber in the hole. Space about 18"-24" apart. You may apply slug and snail bait at this time.

After planting, do not water unless the ground is exceptionally dry. Wait until the first shoots appear above the ground and then water. You can also place collars made from plastic containers around the new shoots to ward off slugs from eating them. After the plants are well established, water deeply 1-2 times a week. They may need more water in hotter climates. Fertilize with high potassium and high phosphorus fertilizers such as 5-10-10 or 10-20-20. Fertilize within a month of planting and then every month thereafter. Avoid over-fertilizing. To promote shorter, sturdier plants with good stalks, pinch out the center shoot after the third set of leaves have been formed. Weed by hand and deadhead regularly to encourage new blooms. Cut your flowers in the cool mornings.

There are possible pests and fungus associated with growing dahlias. Here they are with the treatment.

1. slugs and snails - slug and snail bait
2. earwigs - Sevin
3. spider mites - Malathion, Avid
4. cucumber beetle - Sevin
5. general insects - Orthene
6. mildew - Funginex, Benlate or a general fungicide

After the first frost in the fall, cut off the stalks about 6 inches above the ground and gently lift the tubers with a pitchfork. Wash the tubers gently and allow to air dry in a sheltered area for a day or two. Store in a bed of slightly dampened peat moss in ventilated containers, not plastic bags. The tubers can be layered with the peat moss. Store in a cool dry place and do not allow the plants to freeze.

Dividing can be done in the spring or the fall. Each plant must have an eye to grow, but it may be difficult to see them. The eyes will be located neat the stalk. Use a sharp knife to cut through the tuber. Allow the cut surface to dry overnight before planting or storing.

I wish you the best of luck in growing your dahlias and I'm sure yours will bring you much pleasure!