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Lacecap Hydrangea: How to Plant and Care for Them

Would you ever imagine a plant that can change its flower color depending on the soil? Lacecap Hydrangea (Hydrangea macrophylla var. normalis) does exactly that - its blossoms shift from blue to pink or even purple based on soil pH

By Mariam Scott

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Published on June 12, 2025

Lacecap Hydrangea
Lacecap Hydrangea

In this article

Key Takeaways

  • Lacecap Hydrangea is a visually striking, low-maintenance shrub known for its ability to change flower color based on soil pH.
  • Ideal for shady gardens, containers, and woodland borders, it prefers moist, well-draining soil rich in organic matter.
  • Proper care includes regular watering, seasonal pruning based on the blooming type, and positioning in partial shade.
  • To achieve blue blooms, amend soil with aluminum sulfate; for pink, use garden lime—soil pH is key to color.
  • Can be successfully grown in pots; ensure proper drainage, regular fertilization, and repotting every 2–3 years.
  • Common issues include mildew, pests like aphids or slugs, and yellowing from poor drainage—monitor plant health and act promptly.

"Gardening is the purest of human pleasures." – Francis Bacon

Would you ever imagine a plant that can change its flower color depending on the soil? Lacecap Hydrangea (Hydrangea macrophylla var. normalis) does exactly that—its blossoms shift from blue to pink or even purple based on soil pH. This remarkable ability, combined with its delicate, lace-like blooms, makes it one of the most captivating shrubs for any garden. This lovely variety of hydrangea has a more naturally beautiful and subtle aesthetic than the common mophead hydrangeas, which gives it a special spot in yards of gardeners who appreciate a balance of dainty beauty with rich color.

Lacecap Hydrangea — This flower, native to Japan and China, is famous for its ability to change flower color depending on soil pH, producing pink flowers in alkaline soil and blue flowers in acidic soil. With its airy, lacy blossoms and that lush green foliage,  it is an excellent choice for shady gardens, woodland borders, and container displays.

The Lacecap Hydrangea is an excellent choice if you are looking for a low-maintenance but stunning shrub that will add a bit of romance to your garden.

Common Name Lacecap Hydrangea
Scientific Name Hydrangea macrophylla var. Normalis
Type Deciduous Shrub
Height 3-6 feet
Spread 3-5 feet
Bloom time Late spring to early fall
Flower Color Blue, pink,purple or white (depending on soil pH)
Sun requirements Partial shade to full sun
Soil Requirements Moisture retentive, well-draining and rich in organic matter
Toxicity Toxic to pets when eaten

Plant Care

Lacecap Hydrangea requires moist, well-draining soil and dappled sunlight to thrive. It prefers humid conditions and appreciates regular watering, especially in dry periods. While adaptable, it prefers a mild climate and does best when protected from harsh afternoon sun and strong winds

Light

This type of Hydrangea likes partial shade, especially in hot climates. Of course a spot that gets morning sun and some afternoon shade is best. In cooler areas, it can tolerate more sun but still appreciates some shelter to prevent leaf scorch.

Soil

Lacecap Hydrangea does best in rich, well-draining soil that retains moisture without becoming soggy. pH affects flower color — acidic soil (pH under 6) produces blue blooms; and alkaline soil (pH over 7) produces  pink blooms. To get blue flowers, amend the soil with aluminum sulfate; for pink flowers, add some garden lime.

Watering

Be sure to water regularly, especially in hot or dry conditions. Keep the soil evenly moist but not soggy. Two to three times a week of deep watering helps keep plants hydrated, especially for young plants. Put mulch around the base to keep soil moisture and temperature even.

Pruning

Pruning is important to grow in shape, promote healthy growth, and to maximize blooming. The best time to prune depends on the variety, as some Lacecap Hydrangeas bloom on old wood, while others flower on new growth.

For varieties that flower on old wood, prune immediately after flowering, only cutting back dead or weak stems. Cutting back spent flowers stimulates the plant to invest its energy in root and leaf development. With newer cultivars that bloom on both old and new wood, light pruning in early spring encourages new blooms to form throughout the season.

Do not over prune, as that can inhibit flowering during the next year. Instead, deadhead and thin out crowded stems to promote air circulation.

Propagating

Lacecap Hydrangea can be easily propagated by softwood cuttings taken in late spring or early summer when new growth is flexible but firm..

  • Choose a healthy, non-flowering stem and take a 4-6 inch cutting just below a leaf node. 
  • Snip off the lower leaves and dip the cut end in rooting hormone, making roots grow faster.
  • Plant the cutting in moisture-retentive, well-draining soil and keep it warm (70 to 90 degrees Fahrenheit) in a shaded, high-humidity spot. 
  • After a few weeks, roots should develop, and the young plant can be gradually acclimated to outdoor conditions before transplanting.

Growing in Pots

Lacecap Hydrangea does well in pots, so it can find a home in small space gardens, patios, and balconies. To ensure success:

  • Pick a large pot with drainage holes to avoid root rot.
  • Use rich, well-draining potting soil that retains moisture without becoming soggy.
  • Keep the container placed in partial shade, because too much sun stresses the plant.
  • Water frequently, as potted plants dry out more quickly than those planted in the ground.
  • If you want the best blooms, fertilize every month with a balanced Hydrangea fertilizer.
  • Repot every 2-3 years to replace the old soil and provide plenty of room to grow.

Overwintering

The Lacecap Hydrangea is quite hardy but also needs some additional protection from colder climates. Add a thick layer of mulch, straw or leaves around the base in late fall to help insulate the roots. If you live in a region with harsh winters, wrapping burlap around the shrub can help protect it from frigid temperatures and strong winds.

If it is in a pot, the plant can be brought to a protected place, like an unheated garage or enclosed porch, to prevent it from extreme frost. Water less often, but don’t let the soil completely dry out.

Blooming

The delicate, lace-like flowers of this Hydrangea appear from late spring through early fall, providing a long-lasting display. Several factors affect blooming, like light, pruning and soil pH.

To keep them blooming reliably, place them with a balanced amount of sun and shade, prune the right way for the particular variety, and fertilize lightly but regularly during the growing season. If flower production is weak, check if the plant has been pruned too aggressively or if soil nutrients need adjustment.

Common Issues

Lacecap Hydrangea is fairly strong but can have issues.

  • In high humidity with insufficient air circulation, powdery mildew and leaf spot can appear. Keeping space between plants and avoiding overhead irrigation can help.
  • The plant may have aphids and spider mites.You can treat with neem oil or insecticidal soap.
  • Young leaves can be damaged by slugs and snails. A light layer of crushed eggshells or diatomaceous earth around the base can deter them..
  • Yellowing leaves could be a sign of overwatering or bad drainage. Make sure the soil remains moist but not soggy.
  • Wilting leaves are usually a sign that the plant is not getting consistent enough moisture, or is getting too much direct sun.

Summary

Lacecap Hydrangea is a graceful and low-maintenance shrub giving sophistication and charm. With sufficient light, fertile ground and consistent moisture, it flourishes unfairly easily,rewarding gardeners with delicate, long-lasting blooms. This incredible, classic plant belongs in every landscape, whether it’s in the ground or in pots.

FAQ

The Lacecap Hydrangea is not blooming. Why is that?

This may be due to over-pruning, lack of sunlight, or incorrect fertilizing. Treat the plant based on its blooming habit.

Can I change the flower color of Lacecap Hydrangea?

Yes! Alkaline soil (pH above 7) produces pink blooms, while acidic soil (pH below 6) produces blue flowers. You can apply aluminum sulfate to turn the color to blue or garden lime to have pink.

Do Lacecap Hydrangeas need fertilizer?

Yes, a balanced, slow-release fertilizer applied in spring and mid-summer will promote healthy growth and lots of blooms. Steer clear of too much nitrogen, which encourages lots of leaves but not many flowers.

How do I keep my hydrangea compact?

Light pruning in summer after flowering and the removal of old stems maintain a neat, compact form without sacrificing next season’s flowers.