Hemp-Derived Live Resin Cartridges — Strain-Specific Blends & Multi-Cannabinoid Formulas
Hemp-derived cartridges have evolved dramatically. The early generation of hemp carts was simple: CBD oil in a 510-thread cartridge, full stop. Today's top-tier hemp cartridges are a different category entirely — built around live resin concentrates, strain-specific terpene profiles, and sophisticated multi-cannabinoid blends that combine Delta 8, HHC, THCp, H4CBD, CBG, CBN, and more into formulas engineered for specific moods and effects. At Vape City USA, our hemp cartridge collection starts with one of the most well-regarded names in the space: Mellow Fellow.
What Is a Live Resin Hemp Cartridge?
Live resin is a full-spectrum hemp concentrate made from flash-frozen plant material — harvested and immediately frozen to preserve the complete terpene and cannabinoid profile of the living plant. Unlike standard distillate cartridges, which strip away much of the plant's natural complexity during processing, live resin retains the authentic aroma, flavor, and cannabinoid diversity of the original strain. The result is a richer, more nuanced experience — fuller flavors, more complex effects, and the kind of terpene-forward vapor that distillate simply can't replicate. All Mellow Fellow live resin cartridges contain less than 0.3% Delta-9 THC in compliance with the 2018 Farm Bill and are third-party lab tested for potency and purity.
Mellow Fellow Duo Live Resin Cartridge — 4ml (2 x 2ml)
The Mellow Fellow Duo Live Resin Cartridge is the flagship hemp cart at Vape City USA — and it does something most single cartridges can't. Each Duo pack contains two separate 2ml cartridges (4ml total) pairing two complementary strain profiles and cannabinoid blends in a single package. One cart is typically designed for daytime or uplifting effects, the other for evening or relaxing sessions — giving you a complete day-to-night hemp experience without buying two separate products. Both carts use a 510-thread connection compatible with any standard pen battery or box mod, feature ceramic coil heating elements for clean, even vapor production, and are draw-activated for immediate ease of use.
Available Duo pairings include:
King Louis + Blue Dream — A rich, relaxing indica paired with a smooth hybrid. King Louis brings THC-B, THC-P, HHC, Delta 8, CBN, CBG, and CBD. Blue Dream counters with Delta 8, Delta 10, HHC, CBD, and CBG.
Cali Gas + Forbidden Fruit — A bold, gassy sativa paired with a sweet tropical indica. Cali Gas features THC-H, Delta 11, HHC, Delta 8, CBD, and CBG. Forbidden Fruit delivers THC-V, HHC, Delta 8, CBD, and CBG.
Tres Leches + Bubba Kush — A sweet caramel hybrid paired with a deeply calming indica. Tres Leches features HHC, H4CBD, and CBG. Bubba Kush brings THC-M, HHC, H4CBD, Delta 8, and CBG.
Pineapple Express + MK Ultra — A classic tropical hybrid paired with a potent indica. Pineapple Express features THC-V, H4CBD, HHC, and CBG. MK Ultra brings THC-P, Delta 8, HHC, CBN, and CBD.
Tahoe OG + Strawberry Amnesia — An earthy, grounding hybrid paired with a bright, uplifting sativa. Tahoe OG features HHC, H4CBD, CBN, CBG, and CBD. Strawberry Amnesia delivers THC-P, HHC, Delta 8, H4CBD, CBD, and CBG.
What Makes Multi-Cannabinoid Blends Different?
Single-cannabinoid cartridges — a pure Delta 8 cart, for example — deliver a predictable, one-dimensional experience. Multi-cannabinoid blends like those in the Mellow Fellow Duo leverage what researchers call the entourage effect — the principle that cannabinoids and terpenes work more effectively in combination than in isolation. By blending Delta 8 with HHC, CBG, CBN, THC-P, and other hemp-derived cannabinoids alongside strain-specific live resin terpenes, Mellow Fellow creates layered, full-spectrum experiences that a single-cannabinoid product simply can't replicate. Different blends produce different moods — the specific combination of cannabinoids in each cart is designed with an intended effect profile in mind, from uplifting and creative to relaxing and restorative.
510 Thread Compatibility — Pair With Any Standard Battery
All hemp cartridges at Vape City USA use the universal 510-thread connection — compatible with any 510-thread pen battery or box mod. If you don't yet have a compatible battery, browse our 510 thread pen batteries for a slim, discreet option or our box mod batteries for variable voltage control that lets you fine-tune how the live resin performs on every draw. The ceramic coil heating element in each Mellow Fellow cart works best at lower voltage settings — 2.4V to 3.0V — to preserve terpene integrity and avoid scorching the live resin concentrate.
Why Shop Hemp Carts at Vape City USA?
At Vape City USA we carry only third-party lab tested hemp cartridges from established, compliant brands. All Mellow Fellow Duo carts contain less than 0.3% Delta-9 THC in compliance with the 2018 Farm Bill. All purchases require age verification at checkout — you must be 21 or older to purchase. Browse our full vape accessories collection for compatible batteries and replacement pods.