hybrid
Invisible Ink
Parents
This sativa-leaning hybrid crosses Permanent Marker with Ghost PK1, a clone-only cultivar associated with the Ghost OG family whose exact ancestry remains unresolved. Generally attributed to First Class Genetics, the pairing combines Permanent Marker’s loud gas and sweetness with the citrus, fuel, and OG character often linked to Ghost-derived cuts.
Fans of the strain report a heady, focused onset that settles into a clear-eyed euphoria, with the Ghost PK1 side lending a sharp, cerebral edge that keeps Permanent Marker heaviness from pulling things couch-ward. Reviewers frequently call out how the focused buzz holds steady over longer sessions rather than tapering into fog. Visually, Invisible Ink shows off dense, resinous buds with a frosty trichome coat — the heavy resin production Permanent Marker is known for, filtered through Ghost PK1's sativa-leaning frame.
Invisible Ink is a moderate-difficulty grow that stays around 3–5 feet indoors with a branchy, sativa-influenced frame — making it a solid fit for growers comfortable managing lateral stretch. Outdoors, it can reach 5–7 feet and thrives in warm, Mediterranean-style climates with temperatures around 68–80°F. The dense, resinous colas inherited from its Permanent Marker side can trap moisture, so the plant does best in low-humidity environments during its 8–10 week flowering window. This strain rewards experienced growers with patience, and cultivators often report yields around 350–450 g/m² indoors and 14–18 oz/plant outdoors when conditions stay consistent through harvest.
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