What kind of soil does lavender need in baking?

The key points for growing lavender specifically for culinary uses (including baking):

1. Exceptional Drainage: This is paramount. Lavender roots will rot in soggy soil. Amend heavily with coarse sand, grit, gravel, or pumice. Raised beds are highly recommended.

2. Slightly Alkaline to Neutral pH (6.5 - 7.5): Essential for proper nutrient uptake and flavor development. Test your soil and amend with agricultural lime or wood ash if needed.

3. Lean to Low Fertility: Do not use rich, nitrogen-heavy fertilizers or manures. Rich soil leads to leafy growth and can dilute the aromatic oils that provide flavor. Lavender thrives on lean conditions.

4. No Contaminants: This is crucial since you'll be consuming the plant. Ensure the soil has not been treated with synthetic pesticides, herbicides, or persistent chemical fertilizers. Opt for organic-approved soil mixes and amendments.

5. Appropriate Mulch: Use a mineral mulch like pea gravel or small stones around the base of the plant. Avoid organic mulches (wood chips, straw) directly touching the plant, as they retain moisture and can lead to rot and potential contamination of edible parts.