The board's one hard rule
Hop latent viroid is the quiet catastrophe of modern cannabis: an infectious pathogen that produces no dramatic symptoms while it cuts potency and yield, sometimes by half. Industry testing programs have repeatedly found it in a large share of commercial grows, and it spreads exactly the way you would fear, through cuttings, tools and sap contact.
A seed buyer risks little; HLVd is rarely seed-borne. A clone buyer inherits the complete disease status of the mother plant, which makes the nursery's testing program the single most important fact about any clone listing, above THC, above price, above genetics. An infected $69 cut is not a bargain; it is a quarantine problem you paid to import.
Both nurseries quoted on this board run testing programs on their mother stock. Get Seeds Right Here maintains HLVd-tested mothers across its 500+ strain catalog, and Clones Up runs monthly PCR panels with quarantine intake on new genetics. That standard is the reason this board quotes two nurseries and not twenty.
Practice basic hygiene at home regardless of source: sterilize blades between plants, isolate new arrivals from an established garden for a week or two, and watch new cuts for stunted, brittle growth. Testing upstream plus habits downstream is how home gardens stay clean.