Planting flower bulbs in August is a great way to get a head start on both fall color and next year’s spring blooms. While spring and fall are more traditional planting times, many bulbs benefit from being placed in the ground while the soil is still warm. This gives them time to develop strong root systems before winter or to prepare for an earlier bloom next season. In this guide, you’ll find a list of bulbs you can plant in August, how to plant them, and tips to ensure they grow strong and healthy.
Why August is a Great Time to Plant Bulbs
August may seem like an unusual time for bulb planting, but it offers several advantages. The soil is warm, which encourages quick root development. There is still enough daylight to support growth, and by planting early, you avoid the rush of fall gardening. Planting in August allows certain bulbs to establish before the first frost and even bloom by late fall. Others go dormant until spring, but they benefit from early planting.
Tips for Planting Bulbs in August
Before you start, choose high-quality bulbs that are firm and free of mold or soft spots. Always plant bulbs in well-drained soil to prevent rot, and follow the general rule of planting them at a depth about two to three times their height. Water them well after planting to settle the soil and encourage root growth. If planting in zones with colder winters, add a layer of mulch to protect the bulbs from freezing.
Autumn Crocus (Colchicum)
Autumn crocus is one of the best bulbs to plant in August if you’re hoping for color this fall. These bulbs produce lilac or pink blooms in September or October. They resemble spring crocuses but are much larger and bloom without foliage. Plant them 4 to 6 inches deep in full sun to partial shade. Water them after planting and expect blooms within weeks.
Saffron Crocus (Crocus sativus)
If you’ve ever wanted to grow your own saffron, August is the time to plant saffron crocus bulbs. These small, purple flowers produce red stigmas used in cooking. Plant the bulbs 3 to 4 inches deep in a sunny location with well-drained soil. They usually bloom in October and can return year after year if given the right conditions. Make sure to harvest the saffron threads the day the flowers open.
Madonna Lily (Lilium candidum)
Madonna lilies prefer to be planted in late summer, making August ideal. These elegant white lilies bloom in early summer and have a strong, sweet fragrance. Unlike most lilies, Madonna lilies should be planted just beneath the soil surface—only about 1 inch deep. Choose a location with full sun and fertile, well-drained soil. These bulbs resent disturbance, so plant them where they can remain for several years.
Fall-Blooming Daffodils (Narcissus species)
Some daffodils, especially early blooming varieties, can be planted in August to give them a head start. Zones 7 and warmer benefit the most from early planting. Choose bulbs like Narcissus ‘Autumn Colors’ or Narcissus tazetta, which may bloom in late fall or early spring. Plant them 6 inches deep in a sunny spot and water them well. These bulbs naturalize easily and are deer-resistant.
Lycoris (Surprise Lily or Naked Lady)
Lycoris bulbs are also best planted in August. They grow leaves in spring that die back before the tall flower stalks appear in late summer or fall. These blooms are usually pink, coral, or red. Plant lycoris bulbs 4 to 6 inches deep in full sun to part shade. They thrive in well-drained soil and are especially stunning in garden borders or naturalized areas.
Cyclamen hederifolium
This hardy variety of cyclamen is ideal for planting in August and blooms in fall with delicate, butterfly-shaped flowers in pink or white. It prefers partial to full shade and thrives under trees or in woodland settings. Plant the tubers just below the surface with the top exposed. Cyclamen hederifolium is a perennial that forms a lovely carpet of foliage and blooms in shady areas.
Spanish Bluebells (Hyacinthoides hispanica)
Although traditionally planted in fall, Spanish bluebells can go into the ground in late August, especially in cooler zones. These bulbs produce bell-shaped flowers in blue, pink, or white in mid to late spring. They prefer partial shade and grow well under deciduous trees. Plant them about 4 inches deep and 4 inches apart in humus-rich, moist soil.
Allium (Ornamental Onion)
Allium bulbs come in a wide range of sizes and bloom times, and planting them in August gives them a strong head start. Choose smaller varieties like Allium moly or Allium sphaerocephalon, which bloom earlier than giant varieties. Alliums need full sun and well-drained soil. Plant them 3 to 6 inches deep depending on bulb size. Their globe-like flowers attract pollinators and deter deer.
Snowdrops (Galanthus)
Snowdrop bulbs planted in August will often bloom earlier than those planted in late fall. These tiny white blooms are among the first signs of spring. Plant them 2 to 3 inches deep in partial shade. Snowdrops naturalize well and thrive in moist, humus-rich soil. They look best in groups and work beautifully in rock gardens, along paths, or beneath shrubs.
Dutch Iris
Dutch irises bloom in late spring and benefit from planting in August in zones 7 and warmer. These bulbs produce elegant blooms in shades of blue, purple, yellow, and white. Plant them 4 inches deep in full sun and provide consistent moisture during growth. Dutch irises are excellent for cut flowers and look beautiful in mass plantings or mixed borders.
Anemone blanda (Grecian Windflower)
Anemone blanda bulbs can be planted in late August in cooler climates or stored until September in hotter regions. These cheerful blooms appear in early spring and come in pink, blue, and white. Soak the corms overnight before planting them 2 inches deep in partial sun. They thrive in woodland gardens and naturalized areas, often returning for years.
Watering and Aftercare for August-Planted Bulbs
Once your bulbs are in the ground, water them thoroughly. This helps settle the soil and promotes quick root development. In zones with little late summer rain, continue watering weekly until the ground freezes. Avoid overwatering, as soggy soil can cause bulbs to rot. As fall approaches, mulch around your bulbs to insulate them and retain moisture. Mark the planting areas so you don’t disturb them later when doing fall cleanup or spring planting.
Final Thoughts on August Bulb Planting
Planting bulbs in August offers a rewarding mix of fall color and early spring blooms. Whether you’re planting for immediate flowers like saffron crocus or planning ahead for spring with snowdrops and irises, this late summer window gives you a jump on seasonal beauty. By preparing the soil well, choosing the right bulbs for your zone, and watering carefully, you can enjoy colorful flowers well beyond the typical growing season. With just a little effort now, your garden will reward you for months to come.
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