Plugs, Trays and Heatmats

Starter plugs in trays are ideal for germinating seeds or rooting small plant cuttings. During colder climates a heat mat will encourage root growth or seed germination. If the growing conditions are dry you may want to consider a dome to prevent moisture loss.

View as: Grid View List View
$10.99 - $12.69
A-OK Starter Plugs are designed for starting seeds and plant clones. They come in a sheet that fits any standard 10" x 20" flat.
Black Standard Flat Trays have NO drainage holes and conveniently stack when not in use.
Black 10 X 20 Standard Flat Trays WITH drainage holes that conveniently stack when not in use.
A-OK Starter Plugs are designed for starting seeds and plant clones. They come in a sheet that fits any standard 10" x 20" flat.
Europonic Rockwool Conditioner is a growing media conditioner that neutralizes the pH level of rockwool to provide maximum nutrient uptake to your plants.
Save 20%
Plant seeds need specific levels of heat and moisture to successfully sprout and grow into healthy seedlings.
Save 25%
The Grodan Gro-Smart Tray Insert was designed to hold any of the popular Grodan starter stonewool options.
$41.74 - $82.77
Growcubes are small 1/4-inch cubes of stonewool (rockwool). They're made of the same high-quality stonewool as larger Grodan cubes and slabs, but these miniature sized Growcubes fit any container size or shape.
$11.25 - $328.25
Macroplugs are great for plant cloning or starting seedlings.
$8.74 - $359.15
Grodan mini-blocks is ready to help grow your plants right out of the box. From seeds to cuttings, mini-blocks are perfect for plants in any growth stage.
$22.95 - $41.60
The HF Seedling Heat Mat helps your seeds increase their germination rate and grow faster overall.
Save 20%
Give your plant seeds the warm, moist environment needed to increase the germination rate.
$3.50 - $107.95
Jiffy-7 Peat Pellets are the convenient, no-mess way to start flower and vegetable seeds and cuttings.
The Hydrofarm Jump Start Digital Heat Mat Controller is a digital temperature controller for the heat mats used under plant trays.
These fast-expanding, earth-friendly peat pellets are the refills used with the Hydrofarm Jump Start Pellet Greenhouses.
The Jumpstart 12 Pellet Window Greenhouse is perfect for germinating flower, herb and vegetable seeds.
The Mondi Mini Greenhouse is a seven inch tall dome that fits any 10 X 20 nursery tray.
Four times thicker than regular trays, the Quad Thick Tray offers unmatched durability that will last for years.
If you use the General Hydroponics Rapid Rooter Tray, you will need 50 of these replacement plugs for your next growing season.
The Rapid Rooter Kit comes with a 50-cell plug tray and includes grow plugs.
Ready Gro Super Plugs have the consistency of a sponge-like material. These biodegradable and 100% organic soilless grow plugs are made of composted tree bark and other organic materials.
Provide a steady supply of heat to transplants, plant cuttings and clones with a Redi-Heat Professional Propagation Mat.
Growers can provide a consistent supply of heat to transplants, cuttings or clones using a commercial-grade Redi-Heat Professional Propagation Mat.
This mechanical-style heat mat thermostat provides up to 1800 watts of power.
Made from composted organic materials, Root Riot starter cubes have a great spongy texture which retains the perfect air-to-water ratio for healthy, rapid root growth.
$15.25 - $24.95
Suitable for both plant cuttings and seed germination, Root Riot Cubes give you faster, more vigorous rooting results.
Round Jiffy Peat Pots decompose right into the soil, so there's no risk of root damage because you don't remove the plant from the peat pot.
This Standard Flat Dome covers any 10 X 20 nursery tray to turn it into a mini greenhouse.
The Super Sprouter 2 Tray Heating Mat allows for your propagation trays to be properly heated end to end!
Save 18%
With its precise settings, the Super Sprouter Thermostat lets you contol the seedling heat mat temperature to easily dial in the ideal seedling germination temperature.
Supernatural Super Soak (previously known as Rockwool Soak) is an acid buffer that does not contain ammonia, so there's no worry of your plants getting burned.