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Seed Starting Supplies

Grow Lights | Heat Mats | Jiffy Peat Products | Plant Labels | Plant Trays | Plug Trays | Seeders | Plant Cloning
The best flowers and vegetables start with the best seed and best propagation supplies. Harris Seeds offers you a vast line of plant propagation supplies including propagation trays, humidity domes, peat and plastic pots, rooting hormones, and more.

Growing seed in the proper sized container is critical. Starting items like tomatoes and peppers in 50 cell, 84 cell or 144 cell plug trays instead of 288 trays or 512 trays can give you large enough plants to transplant directly into the field without having to transplant them first into a larger cell or pack. This can save a lot of time and labor. On the other hand, planting really small seeded flowers into large cells hinders germination and the development of a strong root system. Jiffy Peat products are ideal for starting seeds and for transplanting plants directly into the field. Because the roots are not disturbed while transplanting, transplant shock is reduced, resulting in bigger, healthier, and earlier vegetable crops. Jiffy Peat Pots and Jiffy Strips are biodegradable and OMRI approved for organic production.

Harris Seeds carries an extensive selection of seed starting supplies. Buy grow lights, heat mats, Jiffy pots, pellets, plastic plant trays & domes, plug trays.

Essential Seed Starting Equipment and Supplies

If you are a true gardener, buying flowers, fruits, and veggies as starts just isn’t an option for you. You want to start your own garden from scratch, and that means starting all of your plants from seeds.

But you’re going to need some seed starting equipment if you’re going to do it right.

There are a lot of things needed to ensure that the seeds you plant can grow into strong seedlings and young plants. With the right seed starting supplies and equipment, you’ll get your garden started in no time.

Listen to this post on the Epic Gardening Podcast

Why You Need Seed Starting Equipment

When it comes to starting seeds, it’s not always best to plant them directly into the soil of your garden. You can’t control the climate, weather, and temperature outdoors, so a sudden cold snap, heat wave, deluge, or frost could kill off your seedlings. Remember: seeds and seedlings are very delicate, and they are easily damaged.

The reason that you need all the seed starting supplies listed below is because you want total control over the environment in which your seeds grow. By controlling the heat, light, and humidity of the seeds’ environment, you ensure that they have everything they need to grow into strong, healthy seedlings and young plants ready to be transplanted.

Seed Starting Containers

If you talk to gardening enthusiasts, you’ll find that most of them are divided into two camps when it comes to starting seeds in containers. Half of them will say that it’s always best to buy the seed-starting containers from a gardening store, while the other half will insist that you can DIY it–using yoghurt or pudding cups, egg cartons, etc.

Truth is, you don’t NEED a lot of fancy seed-starting containers to grow your seedlings, but they can make your life a whole lot easier.

Basically, any container that can hold up to two inches of soil will do the trick. You don’t want to use a container that will be damaged by water (such as egg carton), as you will be watering the seeds fairly regularly. That is why plastic containers serve as the best option for starting seeds, as they aren’t damaged by water.

You also want containers that have holes in the bottom. This will ensure that the plants’ roots will have space to grow, and that the water that seeps through the soil has somewhere to escape through. The last thing you want is for your plants to rot because the roots have been sitting in stagnant water for too long. Any container you use for your seed-starting will NEED those holes in the base.

Here are a few of your seed-starting container options:

  • Peat Pots – For those who want to go all-natural, peat pots are exactly what they sound like: pots made out of peat. You plant the seeds in the pots, and, once the seeds are grown into seedlings, you plant the entire pot into the ground. The peat will help to protect the seedlings from damping-off.
  • Flats – These are the classic seed-starting containers, and the ideal choice for those who are trying to get their basic garden off the ground. A “flat” is basically a large, rectangle-shaped container with lots of space for the soil and seeds. You may find that some of the seedlings’ root systems become intertwined, as there is no divider to separate the plants. Still, flats are easiest (and cheapest) for starting a lot of seeds.
  • Cell Pack – This is exactly like a flat, but the container comes with individual compartments. You fill the cell pack with soil, place the seeds in each compartment, and when the time comes to remove the seedling, it comes out in a neat little cube. They’re nice and cheap, not to mention available EVERYWHERE.
  • Soil Block – A soil block is exactly what is sounds like: a block of soil for you to start your seedlings. The blocks are usually compressed into cubes, and you just plant your seeds directly into those cubes. They tend to dry out more quickly than the other options, but they can be planted right into the soil of your garden without needing to remove the plant from a container.
  • Individual Containers – Instead of using a huge tray (flat or cell pack), you can always go the route of using individual containers and flower pots for starting your seeds. Paper pots, peat pots, soil blocks, and plastic pots are all options for those who want total control over the environment in which their seedlings grow.
  • DIY Containers – Plastic egg cartons make an awesome DIY cell pack, but you can use plastic yoghurt or pudding cups, paper cups, and even old milk cartons as containers for your seedlings. All you’ll need to do is cut holes in the bottom to ensure the water has a way to drain out!

Recommendation: Jiffy Peat Pellets. I LOVE these. You cannot beat the convenience of them. They expand with water and will easily fill up any seed starting system that you use.

  • Minimizes transplant shock and root damage
  • Free root development
  • Reliable Substrate – same product time after time

In addition to your seed starting containers, you’re going to need some kind of lid to place over the top of the container. This will keep the moisture trapped within the container, encouraging germination.

A tray will help to catch water runoff, so you should definitely place one beneath the container–especially if you are growing indoor.

Seed Starting Potting Mixes

You need to make sure that the soil in which your seeds are going to be planted is fertile, contains the right balance of nutrients, and has the proper pH balance to provide those growing seeds with a healthy environment in which to grow. To do that, you have to find the right seed starting potting mixes.

The good news is that most seeds contain all the nutrients needed to start growing. You won’t need to look for special nutrient-rich seed starting soil right away–not until you transplant the seedlings. Only once the first leaves begin to grow on the seedlings will you need the special soil. For now, stick with a soil that offers:

  • Plenty of air space, ensuring the seed and the newly-sprouting roots have plenty of oxygen to grow. Air space also ensures proper humidity and water absorption in the soil.
  • Proper moisture. Your plants need a lot of water to grow, so you want to find a seed starting potting mix that holds moisture properly.

Also, look for a soil that is free of toxic substances and weed seeds. You probably can’t use the soil from your garden, especially if you have sprayed chemical herbicides, fungicides, or pesticides. The chemicals in the soil will kill the seedlings before they have a chance to grow. And, of course, there are lots of weed seeds in your garden soil, and those weed seeds may steal the moisture and nutrients needed by the seeds–stopping them from growing.

This is why it’s always best to buy a fresh batch of soil when you are going to start seeds. This way, you can be certain that the soil is free of weeds and any toxic substances, and that it is just the right consistency to promote healthy seed growth.

One very popular mixture for healthy potting soil contains:

  • 1 part compost (great for feeding the seeds)
  • 1 part perlite or builder’s sand (the larger particles ensures better air flow and water run-off)
  • 1 to 2 parts freshly bought gardening soil

By mixing these ingredients, you’ll make the perfect soil to start your seeds growing.

If you’re going to buy a seed-starting mix from the gardening store, look for soil that is labeled as “seed-starting mix” and not “potting soil”. And, of course, don’t forget the fertilizer–seaweed or fish fertilizer, compost tea, or some other organic seedling fertilizer.

Recommendation: Espoma Organic Seed Starting Mix. Unless I am making my own mix or have some soil from another gardening project, this is my go-to seed starting mix. It’s organic, has mycorrhizae to promote root growth, and works perfectly for almost any plants you need to start indoors.

Lights for Starting Seeds

In order for plants to grow, they need four things:

  • Light
  • Water
  • Heat
  • Nutrients

Heat lamps provide two of the four crucial ingredients, making them an important part of your seed-starting operation!

The truth is that seedlings need adequate light to grow. Full-grown plants don’t need as much light, but without 14 to 16 hours of illumination, the seedlings won’t grow healthy and strong.

Seedlings without enough sunlight tend to be weak and look very spindly. But if the sun isn’t out for that many hours a day, what can you do? That’s where seed-starting lights come into play!

Starting seeds under lights is the way to be certain that your young plants and seedlings get all the “sunlight” they need to grow. Even if you start your plants on a windowsill, often times they still won’t get enough sunlight. But with heat lamps, you provide both the light and the heat your plants need to grow. You’ll speed up the growth and encourage healthy, strong plants.

If you’re going to use lights for starting seeds, here’s what you need to know:

  1. 14 hours a day is the right amount of light. No less! You can go up to 16 hours per day if you want to encourage faster growth, but make sure the light isn’t so hot that you cause the seedlings to wither or dry out the soil. Use a grow-light system for the best results.
  2. Keep the lights clean. The grow-light bulbs (long tubes) tend to get dusty, and that can reduce the quality and amount of light shining on your plants. Clean them regularly!
  3. Rotate the seedlings. The light bulbs produce the most amount of light at the center of the bulbs and the least at the ends. For this reason, you want to rotate the seedlings. Place the seedlings at the ends of the bulbs into the middle every couple of days, ensuring that the amount of light received by all the plants is equal.
  4. Reflect the light. To double the effectiveness of the grow-light system, install aluminum foil or mirrors to reflect the light back onto the plants. It will help to increase the amount of light absorbed by the plants and soil, leading to faster growth!

Recommendation: EnviroGro 4-Tube Fixture. It’s an amazing lighting fixture that I have used to start seeds season after season. I prefer the 2′ long setup with 4 T5 bulbs, but you can get longer sizes or more (or less) tubes.

For most of us, starting seeds can either be full of joy or fear. Knowing exactly which seed starting supplies will work best is a great way to prepare.