The Best Seed Starting Trays For Beginner Gardeners

Contact us to discuss your requirements of 32 Cells Seedling Trays. Our experienced sales team can help you identify the options that best suit your needs.

Seed starting trays are one of the easiest ways to start vegetable, flower, and other plant seedlings indoors before the weather warms up. They come in a variety of sizes, with different features, and materials, but which ones are best?

Are some seed starting trays better then others and why? This is what I set out to find out this years growing season, in my quest to grow more of my own vegetables at home!

This post contains affiliate links for which we may be compensated if a purchase is made through the links provided. For more information please read our affiliate disclosure.

Are Seed Starting Trays Absolutly Necessary?

In past years, I never really used seed starting trays and always went with a collection of mixed solo cups, old flower pots , yogurt containers, egg cartons, basically whatever I could find and put soil in! While all these containers do work, and can be a great way to garden on a budget, I never really found that much success with my mix and match approach.

The main problem with this approach is that it simply makes things harder to manage. The various containers all require different amounts of water to stay moist, they take up way more space, and you have to move each seedling individually should you want to move them out, under grow lights or into a new window sill.

In short, are seed starter trays necessary for the beginner gardener? No, not exactly, but they sure do make life a whole lot easier, and dramatically improve your chances of success!

Why would we recommend using seed starting trays?

Seed starter trays make life a whole lot easier by conveniently grouping seedlings into easy to manage trays.

• It is much easier to provide adequate lighting when all the seedlings are grouped closely together instead of being spaced out in various size containers. The trays easily fit under grow lights, and can easily be moved around as a group.
• As the seed tray cells are all a uniform size, it is much easier to water, and stay on top of the moistures requirements of the various seedlings. As the seed trays all contain proper drainage, they also help prevent over watering the seedlings.
• It is much easier to plant similar types of plants in their own trays, for example herbs in one, lettuces in another, etc. This helps when needing to harden off or transplant certain seedlings before others.
• Some seed trays even come with clear plastic covers or domes, which help regulate moisture, especially in the beginning phases of germination and growth.

Different Seed Starting Tray Materials and Designs

Most often seed starting trays are made of rigid plastic and are reusable, or are made of super thin recyclable plastic that is meant to be thrown away after using. Some are a combo of plastic drip tray with bio-degradable cells or peat pellets that can later be planted right into the garden.

There are a wide range of designs to choose from, and it can be overwhelming, especially for new gardeners.

Which you'll end up choosing depends on several factors and we'll go over some of the most common designs in this guide to help you decide what will work best for you.

Seed Tray Sizes

Most seed starter trays come in a 10" x 20" size, but differ in the amount of 'cells' or individual plants that can be planted in the tray.

The more cells a tray has, the shorter the time frame before the seedlings out grow the tray and need to be planted out or transplanted into larger containers.

Tray sizes range from 12 cell trays - 128 cell trays! In my experience, tray sizes between 24 cells and 48 cells work best and will safely keep your plants indoors for 4 to 8 weeks before needing to be transplanted.

• Trays with a high number of cells (and thus a shorter growth time indoors) work especially well for lettuces such as spinach, kale, and head lettuces, which can be transplanted out into the garden sooner, either under hoop tunnels or in cold frames, then other plants.
• Trays with a smaller number of cells (for example 24 - 36 cells per tray) are ideal for plants such as tomatoes, cucumbers, bell peppers, herbs, and squashes.

Root vegetables, should when possible always be planted directly in the garden and not transplanted.

If you see roots coming out of the cells or peat pellet inserts, it's time to transplant the seedlings into a larger container or into the garden.

Bio-degradable inserts vs plastic cell trays

Which style of seed starter tray you choose is ultimately up to you.

Bio-degradable cell inserts are great, and make transplanting easy as the entire 'cell' is simply transplanted directly into a larger container or into the garden, and the tray material bio-degrades. They do need to be replaced yearly though and have a tendency to develop mold easier then plastic cell trays do.

Plastic seed starter trays are mostly re-usable, especially the more rigid plastic celled trays. The seedlings can be slightly harder to remove from the trays at transplanting time though, and you may need to use a butter knife, or spoon handle to help loosens the sides of the individual cells.

Never pull on the seedling stems to try and remove the cell from the tray as you will most probably damage the plant!

Additional accessories for your seed trays

Consider these accessories when starting and growing seedlings indoors. They make life a whole lot easier, and increase your chances of success! If you have to pick just one of them, I will always recommend grow lights be the first upgrade to your indoor seedlings!

• LED Grow Lights- specially designed lights to provide the proper amount of lights seedlings require to prevent growth issues.
• Heat Mats- help by keeping soil temperatures consistently warm, speeding up and aiding in germination rates.
• Base Trays- provide drainage for trays with drainage holes, and allow you to water your seedlings from below. Tis can help prevent disease and pest problems!
• Clear Dome Lid- Help keep heat and moisture in the seed tray. Especially important when waiting for seeds to germinate. A great and cheap investment when heat mats are not possible.

The Best Seed Starting Trays For Beginner Gardeners

In our quest to discover which seed trays work best for our vegetable garden needs, we purchased and trialed three of the most commonly available styles of seed starting trays. Biodegradable cell inserts on a plastic base tray, peat pellet inserts with a base tray, and a rigid plastic celled tray with a base for watering.

Jiffy Professional Greenhouse 72-Cell Starter kit

Review:

A great seed starting tray for beginners, just add water and the peat pellets expand. No need for extra potting soil, or filling pots. Seeds sprout quickly and the clear heat dome helps retain moisture, reducing the need to water as often. Downside to this size tray is the short growing time before the seedlings need to be moved to larger pots or transplanted into the garden. Plan accordingly. Perfect for lettuces or plants that can be transplanted within a week or two of germination.

Pros:

• Easy to plant peat pellets
• Comes with clear lid to retain moisture
• Comes with base tray for easy watering
• No need to purchase potting soil

Cons:

• Seedlings quickly outgrow the peat pellets
• pellets need to be replaced after each use

Check Price On Amazon

32 Cell Peat Pot Strips

Review:

Large peat pots provide enough space for plants to grow for 6 to 8 weeks. Perfect for tomatoes, peppers, cucumber, or squash seedlings. Base tray allows for easy watering, though care must be taken not to overwater to prevent mold growth. We found cutting the strips apart before planting made transplanting easier, with less disturbance to the plants. A great, easy to use tray for most plants.

Pros:

• Bio-degradable inserts make planting and transplanting easy
• Larger cell size allows for seedlings to stay indoors longer nd develop healthy root systems
• Comes with base tray for easy watering
• Allows for longer growth time before transplanting

Cons:

• Inserts need to be replaced yearly
• Requires a solid watering tray (sold separately)
• Requires potting soil to fill.

Check Price On Amazon

Vietnam Rattan Basket

For more Nursery Plant Traysinformation, please contact us. We will provide professional answers.

Additional reading:
What are the best ways to clean and maintain plastic flower pots?
Exploring the Diversity of Plastic Plant Saucers for Different Pot Sizes
The Importance of Quality Wicker Baskets
Wire Hangers with Hooks for Dresses / Camisoles / Blouses

Re-Useable 72 Cell Plug Tray

Review:

The re-useable nature of this seed tray requires only adding new potting soil before each use. The deep 1.8 inch plugs allow for more root development despite the high cell count. We found the seedlings to easily grow for up to 4-6 weeks before requiring transplanting. Perfect for herbs, peppers, lettuces etc. Plugs are harder to remove at transplant time though and require loosening of the sides with a spoon or popsicle stick, increasing the chances of damaging roots.

Pros:

• Entire plastic tray is reusable
• Each cell has dedicated drainage hole
• Deep 1.8" cells allow for more root development.

Cons:

• requires base tray for drainage
• seedlings are harder to remove then with bio-degradable inserts or pellets

Check Price On Amazon

Summary

Over all we found that all three styles of seed starting trays had their own pros and cons making them great for different things. With all trays we tried, we found planting 2-3 seeds per cell and then trimming back to just one seedling after sprouting to give the best results.

The small Jiffy peat plugs where great for starting lettuces, herbs, and brassicas that can be transplanted out sooner even in cool weather. Tomatoes and cucumbers struggled in these peat plugs due to the limited growing space for the roots and required transplanting into larger pots fairly quickly.

The larger 32 peat pots where wonderful for plants that require more time to establish before being planted out. Tomatoes, cucumbers, herbs, and squashes all did well in this tray for up to 8 weeks. The only downside was the need to separate and space out some of the plants once they grew so large they where shading the other seedlings.

The re-useable 72 cell tray with 2 inch plugs worked surprisingly well, even for our larger plants, such as tomatoes and peppers. The deeper cell plugs allowed the plants to stay in the trays longer then expected. Removing the plugs without damaging the roots was a bit of a challenge though and took some getting the hang of.

Did you find this guide useful?? Comment & Rate it below, then tag me on Facebook & Instagram: @earthfoodandfire . For more DIY gardening tips & from scratch recipes follow me on Instagram & Pinterest

Nowadays, plug seedlings in trays have become the mainstream choice no matter vegetables, fruits or flowers. It is convenient and quick to raise seedlings in plug trays, and large-scale mass production can be achieved with machine sowing. Plug seedlings are also suitable for growers to standardize seedlings, with good seedling effects and easy to transplant. Together with us on how to select the suitable seed trays for seedlings.

 

Material of seedling tray

At present, the seed trays used for seedling cultivation mainly include plastic seed trays and polystyrene foam trays. The main materials of the plastic plug are polystyrene (PS), polyvinyl chloride (PVC) and polypropylene (PP). The PS is resistant to high temperature, not easy to deform in summer, has good toughness, and does not break easily in winter; The PVC has poor stability and will decompose in long-term high-temperature exposure, become fragile and easily damaged; The PP is hard, brittle texture, and is easy to break in winter. The PS is more practical, but higher cost, so the low-cost PVC tray is used mostly. The EPS foam tray has a low density and can be floated on the nutrient solution pools or Ebb and flow seedbeds, and can be reused after disinfection.

Thickness of seedling tray

The thickness of the common seed trays on the market is 0.6~1.2 mm. 0.6~0.8 mm thickness plug trays are mostly used for manual sowing or one-time use, for example, if selling the young plants with seed trays, the seedling company can choose 0.6-0.8mm thickness tray. 1.0~1.2 mm thickness trays are suitable for machine sowing and reuse after disinfection.

Depth of seedling tray

The depth of the seed tray on the market is 3~5 cm, the deeper the tray depth, the larger substrate quantity and the greater the substrate water retention, then the more conductive to roof growth. There are also special-purpose seeding trays with a depth up to 9~11 cm.

Hole shape of seedling tray

There are two shapes of holes in seeding trays: round and square. The round hole has a smooth inner wall, without corners of the square hole, which is conductive to the winding of the root of plant on the inner wall. The square hole is good for guiding the roots to extend downward, and the substrate capacity is about 30% more than the round one. The water is distributed evenly and the roots can grow better.

Specification of seedling tray

The common seedling tray size is 540mm x 280mm with different cells. The less the number, the larger the cell. The numbers of cells are 32, 50, 72, 105, 128, 200, etc. The selection of plug tray specifications should not only consider the size and shape of the seeds, but also the size of the young plant. Only by selecting the proper size can the seedlings achieve optimal growth.

 

Suitable trays for vegetable and fruit seedlings

Generally, 50 cells tray is fixed for fruits plant seedling, such as cucumbers, luffa gourd, melon, watermelons, pumpkins, etc. (Insert picture of seeding tray)

The 72 cells one seeding tray is mostly for solanaceous vegetable propagation, such as eggplant, tomatoes, etc.

105 cells and 128 cells are mostly for leafy vegetable propagation, such as lettuce, cabbage, kale, pak choi, water spinach, Chinese cabbage, broccoli, etc.

128-hole seeding trays are mostly used to seedling celery, coriander or parsley.         

CONTACT US

:    Web: www.trinog.com

: +86 592      Mob/: +86 133

Want more information on nursery tray? Feel free to contact us.