Bulb Planting Chart

How to Use the Bulb Planting Chart for Gorgeous Blooms Year After Year

Planting flower bulbs at the right time and depth is the key to vibrant, healthy blooms. Our Bulb Planting Chart is designed to take the guesswork out of the process so you can enjoy a stunning display of color in every season. Whether you’re planting tulips, daffodils, hyacinths, crocus, lilies, or gladiolus, proper timing ensures strong roots, healthy foliage, and long-lasting flowers.

Choosing the Right Bulbs for Your Garden

Before you begin, select bulbs suited to your USDA Plant Hardiness Zone. Spring-flowering bulbs like tulips, daffodils, and hyacinths need a chilling period and are best planted in fall, while summer-flowering bulbs such as dahlias, gladiolus, and calla lilies prefer warmer soil and are planted in spring. Always choose firm, healthy, non-GMO bulbs for the best results.

Understanding Planting Depth and Spacing

The general rule for planting depth is to cover the bulb with soil two to three times as deep as the bulb’s height. Proper spacing allows for air circulation, healthy growth, and room for the bulbs to multiply naturally. The Bulb Planting Chart outlines exact depths and spacing for popular varieties, making it easy to follow.

Soil Preparation for Flower Bulbs

Bulbs thrive in well-drained soil enriched with organic matter. Work compost or well-aged manure into the planting area to improve fertility. Avoid heavy, waterlogged soils, as excess moisture can cause bulbs to rot before they sprout.

Sunlight and Watering Tips

Most bulbs prefer full sun to partial shade. After planting, water thoroughly to settle the soil and encourage root development. During the growing season, keep soil evenly moist but not soggy. Once the foliage begins to die back naturally, reduce watering to allow bulbs to rest.

Seasonal Care and Maintenance

• Fall-planted bulbs (tulips, daffodils, crocus): Plant before the first hard frost in your area.

• Spring-planted bulbs (gladiolus, dahlias, lilies): Plant after the danger of frost has passed and soil has warmed.

• Apply mulch to help regulate soil temperature and retain moisture.

• Deadhead spent blooms but allow foliage to remain until it yellows—this is how bulbs store energy for next year’s flowers.

With the right timing, depth, and care, you’ll be rewarded with spectacular blooms that return year after year. Use our Bulb Planting Chart as your quick reference, then shop Park Seed’s premium selection of bulbs to fill your garden with color from early spring through late summer.

Find all the details you need to plant flower bulbs successfully.