August is a high-summer month when gardens are ablaze with color from late-summer bloomers and long-lasting perennials. This period is perfect for enjoying bold, vibrant flowers and supporting pollinators during one of the busiest times for wildlife.
Perennials
– Rudbeckias (Rudbeckia fulgida): Golden-yellow daisy-like flowers with dark centers, perfect for sunny borders.
– Echinacea (Echinacea purpurea): Coneflowers with striking pink, purple, or white petals, loved by pollinators.
– Japanese Anemones (Anemone hupehensis): Elegant, late-flowering perennials in white or shades of pink.
– Crocosmia (Crocosmia): Arching stems of fiery orange, red, or yellow flowers that add drama to borders.
– Sedum (Hylotelephium, formerly Sedum): Succulent-like foliage topped with clusters of pink or red blooms.
Annuals
– Zinnias (Zinnia elegans): Bright, long-lasting blooms in a wide range of colors, ideal for cutting gardens.
– Cosmos (Cosmos bipinnatus): Delicate, feathery foliage and daisy-like flowers in pinks, whites, and reds.
– Marigolds (Tagetes): Sunny yellows and oranges that thrive in hot, dry conditions.
– Nicotiana (Nicotiana alata): Scented, tubular flowers in white, pink, and greenish hues for evening gardens.
Shrubs and Trees
– Hibiscus (Hibiscus syriacus): Exotic-looking flowers in shades of white, pink, purple, or blue.
– Butterfly Bush (Buddleja davidii): Fragrant spikes of purple, pink, or white flowers that attract butterflies.
– Hydrangeas (Hydrangea paniculata, Hydrangea arborescens): Large, showy blooms ranging from white to soft pink or greenish tones.
Climbers
– Clematis (Late-flowering varieties like Clematis viticella): Starry flowers in jewel tones, ideal for adding height.
– Passionflower (Passiflora caerulea): Exotic, intricate blooms that thrive in warm, sheltered spots.
Wildflowers
– Common Knapweed (Centaurea nigra): A meadow favorite with purple thistle-like flowers.
– Goldenrod (Solidago): Spikes of golden-yellow flowers in wild areas or cottage gardens.
Bulbs
– Dahlias (Dahlia): From delicate pom-poms to dinner-plate-sized blooms in an array of colors, dahlias are quintessential for August gardens.
– Lilies (Lilium): Late-flowering varieties, including Lilium speciosum, perfume the garden.
An August garden thrives on warmth and sun, creating a haven of color and texture. To maintain blooms, regular deadheading and watering during dry spells will keep plants looking their best through late summer.
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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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