The Types of Dahlias, by Form and Size
The classification runs to 29 forms and ten size classes. What the categories mean, and which suit a garden or a vase.
Category
Outdoor Plants & Flowers
Perennials, annuals, shrubs and bulbs: what to plant, when to plant it, and how to keep it blooming.
32 articles · Page 2 of 2
How to Identify and Treat Black Spot on Roses
Feathery-edged black spots that yellow the leaf and strip the plant from the bottom up. How to confirm it and what actually slows it.
Why Rose Leaves Turn Yellow
Yellow rose leaves are usually disease, not feeding. How to tell black spot from the handful of other causes.
Why Roses Stop Blooming
Six reasons a healthy-looking rose produces no flowers, and why the most common one is something you did months ago.
When and How to Plant Dahlia Tubers
Depth, timing and orientation decide whether a tuber rots or sprouts. What to do, and why dividing waits until spring.
How to Lift and Store Dahlia Tubers
Most tubers are lost to rot or shrivelling in storage, not to cold in the ground. The drying time and temperature that decide it.
Why Dahlias Stop Flowering
Dahlias flower until frost if you let them. Why yours stopped, and the two jobs that keep them going.
Why Hydrangeas Don't Bloom
Most hydrangeas fail to bloom because the buds were pruned off or frozen, not because of feeding. How to tell which, by hydrangea type.