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Germinating seeds indoors is the ideal way to prepare for an early growing season or try something different; whether that’s starting a garden early, trying out an unfamiliar variety, or just keeping ahead of the competition with growing season.

Ideal, when starting seeds indoors, is using a tray or pot designed for drainage, although you could also create your own using recycled items like egg cartons or empty toilet paper rolls.


Starting your own seeds indoors is an excellent way to expand the variety of vegetable plants available for your garden and can be an extremely satisfying experience. Plus, starting seeds indoors allows you to continue growing vegetables during winter when there may not be an available sunny window or space outdoors.

Growing seeds successfully requires having an ideal lighting system in place. Seedlings need plenty of exposure to light in order to germinate and flourish once up, which means creating an area with enough light so you can plant seeds easily, using grow lights close to their seedlings, and keeping a watchful eye.

Growing seeds indoors has many approaches, each with its own advantages and disadvantages. Some methods might be easier than others – before making your decision, be sure to give each a try and settle on one strategy as your go-to approach.

Start seeds in trays, plugs or cells made of porous material which enables water to soak through and roots to develop through. Other options for starting seeds include egg cartons with holes for every cell as well as empty toilet paper rolls.

When starting seeds in a tray, ensure it has sufficient drainage and contains sterile, lightweight soil. Some seed starting mixes, like E.B. Stone Organics Seed-Starter Mix, already come pre-moisten with the appropriate amount of moisture – saving you from having to soak your seeds overnight in water, which is one of the main causes of failure for new seedlings.

Once the seeds have been planted in soil, you must maintain an ideal warm and moist temperature that encourages their germination. You can do this by placing your trays near an external heat source (like on top of a refrigerator), or use a humidity dome with plastic wrap to retain both heat and humidity to encourage germination.

As soon as your seeds begin to sprout, they should be watered regularly but without overwatering – as overdoing it could cause disease in delicate seedlings.


Soil is more than mere dirt: it is composed of air, water, minerals, living organisms and microbes that all interact to provide crops with a place to grow while also supporting buildings and roads. Soil helps clean air and water while its organisms play an integral part of human survival by creating food cycles for living things to survive in.

Starting seeds indoors requires using a container with drainage holes and filled with lightweight soil mixture that drains quickly – such as commercial seed-starting kits, plastic seed trays or even paper egg cartons.

E.B. Stone Organics Seed-Starter Mix is an ideal lightweight seed starting soil mix to use, providing just enough moisture for proper germination. Plus, its sterility means no contamination will occur and thus disease prevention.

Add the trays to a warm room between 65-75deg F. An indoor heat mat may also work effectively for this. The warmer, the better germination will occur.

If you don’t own a heating mat, using a light timer is an inexpensive and simple way to maintain an ideal seed-starting temperature. Just be sure that it does not become too hot as that could dry out soil more rapidly and result in rot.

Once the seeds have started germinating, check on them frequently and mist lightly with water as needed – taking care not to pour water overtop of the seeds as this could dislodge them!

As soon as your seedlings have their first true leaves, it is time to move them outdoors – but first hardening off will give them the best chance at survival in your garden.

Begin indoor sowing six to eight weeks prior to the last frost date in your area for maximum success and to give the seeds time to germinate before it warms too rapidly.

There are various methods available for starting seeds indoors, each offering their own benefits. Finding one that suits you depends on your personal preferences and the seeds in which you invest – experiment and find the one that is the best fit!


Growing seeds indoors requires using a warm location with ample light – usually on a windowsill with some indirect sun, although you could also place them on a heating mat for optimal conditions.

Seed packets will inform you of what temperatures are ideal for different seeds, but experimentation is the key to discovering exactly which temperatures work. In general, most seeds germinate best at 65-70deg Fahrenheit soil temperatures if this is possible in your climate; otherwise heat mats designed specifically to sit under your potting containers will help them reach this optimal soil temperature more easily.

As soon as your seeds have germinated, you’ll want to ensure they have adequate soil that retains moisture while draining efficiently. Too quickly drying soil could displace seeds and prevent them from germinating properly – therefore the ideal type of medium would be one with fast drainage rates yet holds moisture for maximum effectiveness – such as sterile lightweight soilless mix which allows quick drainage while simultaneously holding in moisture for healthy plant development.

Once your seedlings have sprouted, be sure to water them regularly; only water the bottom of their tray as this could dislodge any seeds that have taken root. After doing this, move them to a warm location where they’ll receive approximately 12 hours of direct light each day.

Temperature control in the room is also key to ensure healthy seed development; temperatures above 75 degrees F could cause their seeds to become leggy or even die off altogether.

To sow seeds, fill your trays about one cm below the rim with peat-free seed compost, making sure all corners are filled and gently compacting it using another tray or block of wood to give a flat surface for sowing.

Assemble modular trays to sow multiple seeds at the same time; when filling, make sure the depth matches up with that of your seeds.

Seed packets should provide instructions on the optimal depth for sowing different kinds of seeds, with some seeds needing to be chilled or soaked before being planted – make sure you read all instructions thoroughly for best results!


When growing seeds indoors, one of the best ways to ensure successful seedlings is using water. By keeping the soil damp and not drying out too quickly, water allows you to keep seeds moist for better germination.

Water can help extend germination periods and ensure rapid plant growth, particularly for vegetables that tend to freeze easily in cold climates like tomatoes, sweet melons and pumpkins. This method can also extend their growing season significantly.

For successful seed germination, first read through the instructions on your seed packet to determine if indoor sowing is allowed and when to plant them – typically six to eight weeks prior to your average last frost date in your area.

Step two is selecting an ideal location for sowing seeds. This should be an area without too much foot traffic and plenty of light; additionally, the temperature must allow your seeds to germinate but without becoming too warm or too cool, ensuring their survival during this process.

After choosing an ideal location, the next step in seed germination is finding an appropriate container. A plastic tray with cells (compartments) may be easiest, although any small container with drainage holes will do.

Once you have selected your container and prepared the appropriate planting depth with your germination medium, carefully press or drop in seeds of various kinds into it. Some seeds need to be nicked before being planted while others simply need covering with enough germination medium to grow properly.

Once your seeds have been planted, take steps to water and monitor them daily. This means inspecting both their reservoir and soil beneath their trays for moisture levels that are neither too dry nor too wet.

Watering seeds and soil regularly is key to successful seed germination, but too much moisture may kill plants. In such an instance, remove excess moisture by draining containers of excess liquid before trying to increase air circulation inside using fans or transplanting seeds into new soil or another container to prevent their drying out.

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