THCA Flower Grades Explained

By Vault Extracts, Biochemistry Engineer

Grade mostly comes down to how the flower was grown and how it's trimmed. Here's what the terms mean.

Indoor

Grown in a fully controlled environment. The top shelf — densest buds, best appearance, most consistent, and priced accordingly.

Greenhouse-grown with supplemental lighting. Excellent quality at a better value than indoor — a smart middle tier.

Rare, high-demand genetics with heavy trichomes and bold terpenes. Limited drops at the premium end.

Smaller, denser nugs from the same batches — the same quality flower, just tighter buds at a lower price. Great everyday value.