You can water at the top or the bottom. Many people get fungal disease, which affects seedling growth, by watering on top of the soil if it is kept too moist. This has never happened to me, but you want to be careful how much water you use. You can avoid this issue by pouring water into the bottom catch tray; the seedlings will absorb it up through the holes in the tray.
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When it comes time to remove your seedlings, a butter knife is your best friend. Just insert it gently along the side of the soil and pop your seedling out.
Always be sure to wash and sterilize your tray kits before use for new seeds. The moment after I transplant my seedlings, I wash my trays out and remove any dirt or debris and let them dry out before storage. When it comes time to start new seeds, I soak my trays in a diluted bleach solution to kill off any lingering bacteria that could harm my new seed babies. You can use a 9:1 ratio of water to bleach, or 9 cups of water for every 1 cup of bleach.
I personally do not use a heating mat and do just fine; however, I see plenty of gardeners and, for sure, farmers who use them and have excellent and speedier germination. I don&#;t feel this is necessary to get started if your space is warm, but it can definitely help.
There is also an option to purchase a dome. I have used domes at times and not used them at times, and in my opinion, they aren&#;t totally necessary if you have a warm space to start your seeds. If your space is a little cooler, like less than 72 degrees, then a dome can provide extra warmth and humidity for your seeds to germinate.
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!
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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!
Seed starter trays make life a whole lot easier by conveniently grouping seedlings into easy to manage trays.
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.
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.
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.
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.
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Never pull on the seedling stems to try and remove the cell from the tray as you will most probably damage the plant!
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!
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.
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.
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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.
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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.
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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.
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