A Step-By-Step Guide on How to Plant Your Dahlia Tubers

Choosing the Right Tubers

Begin by selecting high-quality dahlia tubers from Shipping Lane Dahlias! Look for tubers that are firm and plump, free of mold or rot, and have visible eyes or growth points.

Preparing the Soil

Dahlias thrive in well-drained soil with a neutral ph. Before planting, prepare the soil by adding compost or well-rotted manure to improve its fertility. Ensure the planting site receives plenty of sunlight, as dahlias need at least six hours of direct sunlight each day.

Planting the Tubers

Time to Plant: Plant dahlia tubers after the last frost when the soil has warmed up to around 60 degrees, typically in late spring. In the PNW, Mother’s Day weekend is a great time to plant.

Hole Preparation and Plant Support: Dig holes about 6 to 8 inches deep and 12 to 18 inches apart for each tuber. Drive a 48-inch stake into the ground before you place your tuber to avoid damaging the tuber later.

Placement: Place the tuber in the hole with the eye facing up, closest to the stake. Cover it with soil, ensuring the top of the tuber is about 2 to 3 inches below the soil surface.

Watering

Dahlias need plenty of water to grow and bloom! Do not start to water till growth is about 4 to 6 inches above the soil. Water the plants often and keep the soil moist but not waterlogged.

Pinching

Pinch the stem just above the third set of leaves when three sets of leaves are showing. Pinching will give you twice the blooms!

Fertilizing and Care

Dahlias benefit from regular feeding. Apply a balanced fertilizer every 3 to 4 weeks throughout the growing season. Deadhead spent blooms to encourage more flowers and prune back any excessive growth to promote good air flow.

Pest and Disease Management

Keep an eye out for common pests such as aphids, slugs, and spider mites. Use organic or chemical treatments as necessary. Marigolds, Garlic, and Allium are all plants that deter bugs. Plant them along the border of your Dahlia bed.