
Compact varieties can be planted with multiple tubers per square foot. The largest varieties of Dinner Plate Dahlias will do best with wider spacing, about 12-18 inches apart, to allow for foliage and flowers to grow. Most Dahlias are spaced with approximately one tuber per square foot.

Spacing will vary based on your varieties.Don’t skip this step! Preparation is the key to success. First, prepare your soil as outlined above. Dig at least 10 inches to 1 foot deep (or create a raised bed 10 inches to 1 foot deep) to loosen the soil and give tubers enough space to grow and to improve soil drainage.ġ.Organic material will feed your Dahlias, and help the soil to retain moisture as needed for the plants. Look for a fertilizer that’s low in nitrogen, to encourage blooms and not too much leafy growth. Enrich your soil with compost work in a good organic fertilizer before planting.If you have challenging soil, or if you live in an area with heavy rainfall, you may want to consider growing Dahlias in berms or raised beds to create optimal conditions. If you’re starting with clay soil, dry soil, or compacted soil, it will be important to make sure that you properly prepare your planting area in order to see growth and blooms.

Dahlias are great for sandy, loamy, or acidic soil. Soil must be well-draining, because Dahlias like plenty of water, but soggy soil will cause tubers to rot.

Loose, nutrient-rich soil will feed tubers and encourage strong root growth. Dahlias prefer rich and well-drained soil.With a well-prepared soil bed, your Dahlias will create beautiful growth very quickly. Some plants can handle any growing condition, but Dahlias really need the right conditions to produce the outstanding blooms they’re known for.
