u/hpswamy1992

I’m setting up a dedicated raised garden bed for blueberries in Oakville, Ontario (Zone 6) and I’m hitting a bit of a pH wall. I’m hoping to get some community feedback on my acidification strategy before my plants arrive next week.

The Setup:

• Bed Type & Dimensions: Raised garden bed, 2.5ft x 10ft
• Construction: The bed is open at the bottom and in direct contact with the native soil underneath.
• Soil Mix: Excavated/filled to 14 inches with a mix of 60% peat moss and 40% native soil.
• The Problem: My ph meter is still only averaging a pH of 6.5.
• The Challenge: I know Oakville soil is quite alkaline and acts as a "buffer" that resists change. Since the bed is in direct contact with the ground, I’m worried that native soil alkalinity is fighting the peat moss more than I expected.

The "Bridge" Strategy (Planting Day is next week!): Since the soil won't be in the 4.5–5.5 range by next week, I’m using these steps to protect the new bushes:

• "Acid Pockets": I’m planting three 2-gallon bushes into individual pockets filled with roughly 100% pre-dampened peat moss to give the roots an immediate acidic home.
• Vinegar: I’ve heard about the vinegar trick (adding diluted vinegar to water) to help lower pH until the sulfur kicks in—has anyone here had real success with that as a temporary fix?

What do you guys think?