Perennials
Perennials are plants that live for more than two years, returning season after season. Unlike annuals, which complete their life cycle in a single growing season, perennials grow back each year from their root systems. Their ability to endure through multiple seasons makes them a popular choice for gardeners seeking long-term color and structure in their gardens.
Perennials can vary widely in appearance, from flowering plants like daisies, peonies, and lavender, to foliage plants like hostas and ferns. Many perennials bloom at different times of the year, ensuring that gardens remain vibrant and full of life throughout the seasons. Some are evergreen, maintaining their foliage throughout the winter, while others die back in the colder months and re-emerge in spring.
Growing perennials is often seen as a cost-effective and low-maintenance choice for gardens, as they do not need to be replanted annually. They typically require regular care such as watering, occasional division to prevent overcrowding, and seasonal pruning to maintain their health and appearance. By selecting a variety of perennials, gardeners can create diverse, sustainable, and beautiful gardens that evolve year after year.
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RHS Hardiness Ratings | USDA Plant Hardiness Zones | Approximate Temperature Range (°C) |
---|---|---|
H1a H1b H1c |
13 12 11 |
>15°C 10 to 15°C 5 to 10°C |
H2 | 10b | 1 to 5°C |
H3 | 9b to 10a | -5 to 1°C |
H4 | 8b to 9a | -10 to -5°C |
H5 | 7b to 8a | -15 to -10°C |
H6 | 6b and 7a | -20 to -15°C |
H7 | 6a | Below -20°C |
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Square Top Pots
Top Dimensions | Base Dimensions | Height | Volume |
---|---|---|---|
10 cm x 10 cm (4 in x 4 in) | 8 cm x 8 cm (3 in x 3 in) | 10 cm (4 in) | 0.6 L |
15 cm x 15 cm (6 in x 6 in) | 12 cm x 12 cm (5 in x 5 in) | 15 cm (6 in) | 2 L |
20 cm x 20 cm (8 in x 8 in) | 15 cm x 15 cm (6 in x 6 in) | 20 cm (8 in) | 5 L |
30 cm x 30 cm (12 in x 12 in) | 25 cm x 25 cm (10 in x 10 in) | 30 cm (12 in) | 18 L |
40 cm x 40 cm (16 in x 16 in) | 35 cm x 35 cm (14 in x 14 in) | 40 cm (16 in) | 56 L |
50 cm x 50 cm (20 in x 20 in) | 45 cm x 45 cm (18 in x 18 in) | 50 cm (20 in) | 113 L |
60 cm x 60 cm (24 in x 24 in) | 55 cm x 55 cm (22 in x 22 in) | 60 cm (24 in) | 216 L |
Round Top Pots
Top Diameter | Base Diameter | Height | Volume |
---|---|---|---|
10 cm (4 in) | 8 cm (3 in) | 10 cm (4 in) | 0.5 L |
15 cm (6 in) | 12 cm (5 in) | 15 cm (6 in) | 1.7 L |
20 cm (8 in) | 15 cm (6 in) | 18 cm (7 in) | 3.2 L |
30 cm (12 in) | 25 cm (10 in) | 30 cm (12 in) | 14.7 L |
40 cm (16 in) | 35 cm (14 in) | 40 cm (16 in) | 37 L |
50 cm (20 in) | 45 cm (18 in) | 50 cm (20 in) | 88 L |
60 cm (24 in) | 55 cm (22 in) | 60 cm (24 in) | 181 L |
Notes on Sizes
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