Seed Starting Supplies | Johnny's Selected Seeds

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Johnny's offers all the seed-starting and propagation supplies you need to grow your own professional-quality seedlings with efficiency. Growing your own transplants from seed provides greater control over the growing season, from start to finish, by allowing you to choose your favorite varieties, select specific planting and transplanting dates, and produce the quantities of plants you need.

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246 Products

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1-Cell Handheld Soil Blocker Soil Blocking

1-Cell Handheld Soil Blocker

Create soil blocks for seeding and transplanting.

Johnny's Commercial Heat Mat – Master Seedling Heat Mats

Johnny's Commercial Heat Mat – Master

Improved germination for heat-loving crops.

New

Polypro Endurance Shallow Speed Tray (No Holes), Black – 24 Count Support Trays

Polypro Endurance Shallow Speed Tray (No Holes), Black – 24 Count

Reinforced trays with "bumpers" for soil block alignment.

SureRoots® 50-Cell Deep Plug Flats – 25 Count Cell Flats

SureRoots® 50-Cell Deep Plug Flats – 25 Count

Promotes deeper root development.

20-Row Seed Flats – 50 Count Cell Flats

20-Row Seed Flats – 50 Count

Ideal for seed starting.

Pro-Tray 38 Cell Flats – 100 Count Cell Flats

Pro-Tray 38 Cell Flats – 100 Count

For home and market gardeners. Round cells.

Polypro Shallow Tray (With Holes), Multi – 6 Count Support Trays

Polypro Shallow Tray (With Holes), Multi – 6 Count

Solid shallow trays with holes (for drainage).

Hang It Adjustable Hanger Grow Lights and Carts

Hang It Adjustable Hanger

LED or T5HO Strip Light Accessory

Quickly adjust the height of lighting as plants grow.

Long Dibbles Soil Blocking

Long Dibbles

Soil Blocker Accessory

Use with soil blockers to create dibbled holes for seeds or cuttings.

Polypro 5x5 Insert Pots – Red, 24 Count Plastic Pots

Polypro 5x5 Insert Pots – Red, 24 Count

Resilient and reusable.

7294/7295 Replacement LED Tube – 48", 1 Count LED

7294/7295 Replacement LED Tube – 48", 1 Count

Replacement tube for #7294 and #7295 light carts.

3 1/8" Round Fertil Pots – 1,370 Count Biodegradable Pots

3 1/8" Round Fertil Pots – 1,370 Count

100% organic, OMRI Listed® biodegradable pots.

Replacement Blades Seed Starting Supplies

Replacement Blades

Grafting Knife Accessory

For the 7172 Miter-Cut Grafting Knife.

LED Strip Light – 48" Grow Lights and Carts

LED Strip Light – 48"

Design your own custom seedling growing space.

Seed Plate A50 Seed Starting Supplies

Seed Plate A50

Precision Vacuum Seeder Accessory

50 large countersunk holes, size A.

Hanging Clips Grow Lights and Carts

Hanging Clips

LED or T5HO Strip Light Accessory

Ideal for suspending SunBlaster lighting above your growing area.

Connector Set LED

Connector Set

Johnny's Modular LED Grow Light Cart Accessory

Locks two Johnny's Modular LED Grow Light Carts together.

18 Cell Fertil Pots Strip – 10 Count Biodegradable Pots

18 Cell Fertil Pots Strip – 10 Count

100% organic, OMRI Listed® biodegradable pots.

Growlight Garden Seed Starter Kits

Growlight Garden

Complete kit for growing a garden in your home.

New

72-Cell Conversion Kit Soil Blocking

72-Cell Conversion Kit

Johnny's Commercial Soil Blocker Accessory

Convert your 50-cell blocker to a 72-cell configuration.

Lightweight Shallow Trays – 36 Count Support Trays

Lightweight Shallow Trays – 36 Count

A great multi-use tray for any operation.

Polypro 5x5 Insert Pots – Blue, 24 Count Plastic Pots

Polypro 5x5 Insert Pots – Blue, 24 Count

Resilient and reusable.

8 and 16-Tray Light Cart Replacement LED Tube – 48", 1 Count LED

8 and 16-Tray Light Cart Replacement LED Tube – 48", 1 Count

Replacement tube for #6221 and #6248 light carts.

Smart Pot® – 3 Gal. Grow Bags

Smart Pot® – 3 Gal.

Fabric planters promote healthy roots.

Medium Weight Mesh Tray – 50 Count Support Trays

Medium Weight Mesh Tray – 50 Count

Reinforced support for other seedling containers.

Standard Dibbles Soil Blocking

Standard Dibbles

Soil Blocker Accessory

Use with soil blockers to create dibbled holes for smaller seeds.

Seed Plate C72 Seed Starting Supplies

Seed Plate C72

Precision Vacuum Seeder Accessory

72 small plain holes (not countersunk), size C.

12 Cell Fertil Pots Strip – 64 Count Biodegradable Pots

12 Cell Fertil Pots Strip – 64 Count

100% organic, OMRI Listed® biodegradable pots.

Wall Flower Hanging Planter – Saddle Bag Grow Bags

Wall Flower Hanging Planter – Saddle Bag

Ideal for growers with limited space.

Mini Square Plastic Pots – 540 Count Plastic Pots

Mini Square Plastic Pots – 540 Count

For big stocky transplants.

2" Clear Acrylic Domes – 50 Count Humidity Domes

2" Clear Acrylic Domes – 50 Count

Holds moisture and warmth for germination.

Johnny's Commercial Heat Mat – Add-On Seedling Heat Mats

Johnny's Commercial Heat Mat – Add-On

20-Cell Stand-up Soil Blocker Soil Blocking

20-Cell Stand-up Soil Blocker

Create soil blocks for seeding and transplanting.

Paperpot Seedling Tray – Individual Transplanters

Paperpot Seedling Tray – Individual

Paperpot Transplanter Accessory

Tray sized specifically for Paper Chain Pots.

Maxi Square Plastic Pots – 540 Count Plastic Pots

Maxi Square Plastic Pots – 540 Count

For larger seedlings like peppers and tomatoes.

Strip Light Stand Grow Lights and Carts

Strip Light Stand

LED or T5HO Strip Light Accessory

Create the perfect tabletop growing environment.