Hydrangea Color and Soil pH

The video discusses soil health, focusing on soil pH and its impact on plant growth. It highlights how hydrangeas can indicate soil pH through their flower color, with pink indicating alkaline and blue indicating acidic conditions. The video explains how to change hydrangea colors by adjusting soil pH using sulfur, lime, oak leaves, or wood ash. It also notes that some hydrangeas, due to genetic factors, cannot change color.

What is the pH level of neutral soil?

• pH 5

• pH 6

• pH 7

• pH 8

Which color does a hydrangea flower turn in alkaline soil?

• Yellow

• White

• Pink

• Blue

What can you add to soil to make a pink hydrangea turn blue?

• Lime

• Sand

• Wood ash

• Sulfur

Which of the following is a method to raise soil pH?

• Adding sulfur

• Using oak leaves

• Adding lime

• Using peat moss

Which hydrangea variety is mentioned as having a fixed white color due to genetics?

• Hydrangea macrophylla

• Oakleaf hydrangea

• Hydrangea arborescens

• French hydrangea

What is the flower color of the Oakleaf hydrangea?

• Red

• White

• Blue

• Pink

How can you change the color of a macrophylla hydrangea to pink?

• Add peat moss

• Raise the pH

• Add sulfur

• Lower the pH

What is a natural material you can use to lower soil pH?

• Wood ash

• Oak leaves

• Sand

• Lime

How long might it take to see a color change in hydrangeas after adjusting soil pH?

• A few days

• A couple of years

• A few weeks

• A few months

Which of the following is NOT a method to change hydrangea color?

• Using wood ash

• Applying fertilizer

• Using sulfur

• Adding lime