Mars Hydro
Discount code — FC / FC-E / SP lights & tent kits
Code tested working at mars-hydro.com checkout on Sep 27, 2026. Applies to FC and FC-E bar lights, SP series lights, and grow tent kits.
Black Friday Grow Deals 2026
Black Friday is Friday, November 27, 2026. This page is the watchlist: the gear growers actually upgrade when the sales hit — lights and tents, drying and curing upgrades, pH meters, timers and controllers, reservoirs and pumps. Prices move fast that week and live at Amazon; tap Show deal on anything here to see the current price with our tag applied. We re-check this page through the sale.
As an Amazon Associate, we earn from qualifying purchases. Adults 21+ only.
Lighting & tents
AC Infinity at Trimleaf
Cloudline Lite A6 fan
AC Infinity's 6″ Cloudline Lite inline fan with speed controller, on sale at Trimleaf — code AC5 takes an extra discount on AC Infinity gear there. Trimleaf price-matches, with free shipping over a small minimum.
Gorilla Grow Tent
DE Pro Series commercial light — half price
Gorilla's pro DE fixture: 600–1150W dimmable in 1% steps, HPS/CMH compatible, 94.7% efficiency, 3-year warranty — listed at half price. Ships with a 240V cord; the 120V cord is a separate add-on.
California LightWorks
SolarSystem LED lights on sale
US-made SolarSystem and SolarXtreme fixtures on sale on select models, no code needed — one of the deepest light discounts on this page. Verified Oct 18–19, 2026, but it ends fast.
MIGRO comparison via Vivosun
4×2 grow tents compared
MIGRO-tested 4×2 tents from Mars Hydro, Vivosun (best value overall), AC Infinity CLOUDLAB 642 and Gorilla 2×4 (tallest, strongest zippers).
Vivosun
Military discount — code VETERANS
Vivosun's standing military service discount, confirmed Oct 2026: enter VETERANS at checkout on vivosun.com. Works across the lineup — Smart Grow tents, AeroLight LEDs, GrowHub controllers and humidifiers.
LED Grow Lights Depot
Goliath grow tent discount — code GOLIATH
Code GOLIATH discounts Goliath grow tents — the retailer's best tracked code right now, with separate discount codes for LED brands and sitewide orders. Code list revised Oct 18, 2026.
Spider Farmer
G4500 (2026) — 320W LED grow light
320W full-spectrum LED. Coverage: 2×4 ft / 3×5 ft.
Drying & curing upgrades
Happy Hydro
AC Infinity 6-Tier Herb Drying Rack, 24"
Six-tier hanging drying rack, 24-inch diameter — hang it in the tent and lay buds out to dry with airflow on all sides.
Happy Hydro
Grove Bags TerpLoc Windowed Pouches, 1 LB
TerpLoc windowed pouches in the 1 lb size — cure and store flower in the bag, with a window to check on it.
Growers House
Boveda 67g 62% 2-Way Humidity Control Pack
Boveda's 67g two-way humidity pack at 62% RH — drop one in the curing container and it holds the humidity both ways.
Grove Bags
Grove Bags TerpLoc Curing Pouches — 1 oz, Windowed
TerpLoc curing pouches with a window — the film holds the cure zone and protects terpenes without burping jars.
Boveda
Boveda 62% Humidity Control Packs
Two-way humidity packs that hold 62% RH both ways — drop one in a jar or bin and it absorbs and releases as needed.
Amazon
Dry Rack Hanging Mesh — 6 Layer, 24 in
Six zippered mesh layers that hang from one hook — a tent's worth of drying in 2 square feet.
Amazon
Mini Hygrometers for Jars — 12 Pack
One per jar. Cure to the number (58-62%) instead of guessing by feel.
Amazon
Vacuum Sealer Bags Quart — 50 Pack Precut
Precut quart bags for the sealer — portion and freeze overstock without freezer burn.
pH & testing
Apera Instruments
Apera Instruments PH20 pH Tester Kit
Waterproof pocket pH tester kit with automatic calibration and a replaceable probe — the budget benchmark for pH.
Bluelab
Bluelab pH Pen
The hydro-shop standard: fully waterproof, backlit display, double-junction probe and auto-off to save the battery.
Bluelab
Bluelab PENCON Conductivity (EC) Pen
Conductivity pen measuring EC, CF and ppm in 500/700 scales — fully waterproof with a backlit display.
HM Digital
HM Digital COM-80 EC/TDS Meter
Waterproof meter that reads EC, TDS and temperature with auto-calibration — a tough, affordable combo meter.
Amazon
Apera PH20 pH Pen — Waterproof, Auto Calibration
The step-up pH pen: replaceable probe, two-point auto calibration, genuinely waterproof.
Amazon
Apera EC20 Conductivity Pocket Tester
The EC twin of the PH20 — matched pair for feed mixing in under a minute.
Amazon
Milwaukee PH600 Digital pH Pen
Budget pH pen with manual calibration — the gateway meter that beats drops and strips.
Amazon
5-in-1 Water Quality Meter — pH, TDS, EC, Salinity, Temp
One pen for the whole mix: pH, EC/TDS, salinity and temperature with ATC.
Electrical & control
Garden Supply Guys
CLOUDLINE S4 4" Inline Duct Fan with speed controller
AC Infinity's quiet 4-inch inline duct fan system with a wired speed controller — the exhaust half of a tent's airflow.
Garden Supply Guys
CONTROLLER 69 PRO WiFi (controls 4 devices)
AC Infinity's WiFi controller runs up to four devices on independent programs, with dynamic temperature and humidity triggers and app data logging.
Amazon
Duct Booster Fan 6 in — 240 CFM with Speed Switch
In-line booster that gives long duct runs their push back. Built-in speed switch, plug-and-play cord.
Amazon
Fan Speed Controller — Variable Dial
Plug-in variable controller for AC inline fans. Dial down night noise, keep temps in range.
Amazon
Inkbird ITC-308 Temperature Controller
Dual-relay thermostat: one outlet heats, one cools. A grow-room staple for fans and heaters.
Amazon
Inkbird IHC-200 Humidity Controller
Dual-relay humidity controller — runs a humidifier and dehumidifier/fan from one probe.
Amazon
CO2 Monitor and Controller — NDIR Sensor
Reads and doses CO2 from one unit — holds 1000-1200 ppm in sealed rooms.
Amazon
Replacement Probe for Inkbird Controllers
Spare temperature probe — the part that fails first, and the cheapest insurance.
Water & reservoirs
VIVOSUN
VIVOSUN 260GPH Submersible Water Pump
Compact 260GPH submersible pump with adjustable flow — a workhorse for reservoirs, drainage and hydro systems.
VIVOSUN
VIVOSUN Automatic Drip Irrigation Kit — VSH-IS01
All-in-one automatic drip irrigation kit that waters on schedule while you're away from the grow.
VIVOSUN
VIVOSUN 800GPH Submersible Pump
The bigger sibling: 800GPH for large reservoirs, fast drain-downs and strong circulation.
Amazon
Drip Irrigation Kit — 100 ft, 1/4 in, Emitters and Timer-Ready
Complete drip starter for beds and pots: mainline, tubing, emitters, stakes and fittings.
Amazon
Drip Emitters 2 GPH Pressure Compensating — 50 Pack
Even output on slopes and long runs — every plant drinks the same.
Amazon
Soaker Hose 50 ft — Flat Weeping
Slow, deep watering for rows and beds with almost zero evaporation loss.
Amazon
Digital Water Timer — Dual Zone, Rain Delay
Two independent zones on one faucet with rain delay — beds and pots on their own schedules.
Amazon
Submersible Water Pump 400 GPH — Ultra Quiet
Reservoir and transfer pump sized for small hydro and hand-watering wands.
Seeds & starter gear
Multiverse Beans BOGO
Mega BOGO — 182 seeds in one bundle
Pick any 2 Mega 50-packs — 100 feminized seeds, plus 63 Seed Multiplier bonus seeds and 19 free in cart: 182 total. 100% germination guarantee.
JinxProof Genetics
Fall Frenzy — free Sharkberry tester pack with every order
Sale ended. While it ran, code Fall420 discounted the whole store and every order got a free Sharkberry tester pack — already gone from JinxProof's homepage when re-checked Oct 19, 2026.
Multiverse Beans
Kush Mints Auto — Preservation Line, 5-pack
The most-reviewed strain at Multiverse Beans: a perfect 5.0 stars across 42 reviews. Preservation Line feminized autoflower, 5-pack — in stock when checked.
Multiverse Beans · Mephisto Genetics
Ripleys OG — FEM Auto, highest rated
The highest-rated strain at Multiverse Beans: a perfect 5.0 out of 5 from 49 reviews. Mephisto Genetics feminized autoflower — worth watching for a restock.
Seeds Here Now · Solfire Gardens
Mad Dog Feminized — 6-pack
Solfire's Purple Marmalade × Hood Candyz cross — tangy diesel-citrus, 20–25% THC, 9–10 week flower. More Solfire packs on sale on the same page.
MSNL
Alien OG Feminized — 5-pack
Half price on the 5-seed pack, no code needed, while stock lasts.
ILGM
Buy 10 Get 10 Free — sitewide standing offer
The White Widow 10-pack doubles to 20 seeds under this offer. Extra discount if you pay with Bitcoin. Germination guarantee on every order.
Multiverse Beans
Final Season sale — deep discounts + BOGOs
Multiverse is closing around Nov 13, 2026 and clearing the vault: breeder discounts across the store, Fat Cat Labs buy-2-get-3-free, Night Owl buy-2-get-1-free. Bigger orders unlock 18 free seeds + free shipping.