Choosing Between Mophead and Lacecap: Which Hydrangea Fits Your Garden Style?

Color Magic: Blue, Pink, Purple, or White?

Soil pH Changes a Lot

With many hydrangea macrophylla varieties, bloom color depends on hydrangea soil pH and aluminum availability. Acidic soil can push blooms blue, while more alkaline soil tends to produce pink flowers.

That’s the short version, anyway. The full chemistry lesson makes my eyes cross a little, and I teach this stuff.

How Gardeners Shift Color

For bluer flowers, gardeners often use aluminum sulfate for hydrangeas. For pinker flowers, lime for hydrangeas can help raise pH over time.

Just don’t expect instant results. This is a season-by-season adjustment, not a weekend makeover.

Not Every Bloom Will Change

Some varieties are naturally more responsive than others, and white hydrangea varieties usually stay white. Purple tones often show up in that in-between zone when the plant is still sorting itself out.

If you’ve ever wondered about hydrangea color change, the answer is usually “yes, but with limits.” Hit the next button below, because bloom color is fun, but reblooming habit may matter even more if you garden where winters get nasty.