How big should seed starting trays be?

A standard size (1020) seed tray is slightly larger than 10 inches long by 20 inches wide. For example, a standard size seed tray might be 11 inches long by 21 inches wide, with a depth of 2 to 2.5 inches. Sometimes, seed trays have separate compartments (cells) for each seed or group of seeds.

How deep do seed trays need to be?

Most seeds don’t need to be sown particularly deep, with a covering of around a quarter of an inch (0.5cm) about right for most crops.

How many seeds do you put in a seed tray?

Plant at least 2 seeds in each hole. This helps make sure at least one of the seeds will germinate in each cell. If both of the seeds start to grow, you can always cut back or remove the weakest looking plant. Plant 4 seeds if they are small. This gives more chances for them to grow.

What containers are best for growing seeds and why?

Plastic pots are best for starting seeds. Good drainage is essential. Plastic pots or containers are preferable to clay pots when starting seeds, as they retain moisture more consistently. Wide, shallow containers prevent both overcrowding of seedlings and excessive moisture around fragile, young roots.

Should seedlings be in direct sunlight?

Initially place seedlings outdoors in a sheltered spot – protected from wind and direct sun. Each day following, expose plants to another 30-60 minutes of filtered sunlight. By the end of the hardening-off time frame, seedlings should be experiencing the same amount of sunlight they’ll receive in the garden.

Should seed trays have drainage holes?

Any type of seed tray that you use must have sufficient drainage holes and saucers. The holes keep water from getting trapped for a long period of time. The saucer underneath prevents dirty water from dripping where it shouldn’t and will also retain some of the moisture in the tray.

What happens if you put too many seeds in a hole?

You should perform a germination test to what percent of the seeds sprout. If half of the ones you sow sprout. Then you plant multiple seeds into a hole. Generally if you plant multiple seeds into a hole, if both plants grow out you will have to cut, kill or transplant the secondary (usually weaker) plant.

How many seed trays are in a seed tray kit?

The transparent plastic of this seed tray kit lets you view them clearly. The set includes ten seed trays along with watertight base trays, and humidity domes to go with them. The adjustable vents of the latter allow you to regulate temperature and humidity.

What sizes do Johnny’s seedling trays come in?

New for 2022! Johnny’s offers a selection of trays, flats, and humidity domes to accommodate whatever it is you decide to grow. All of our seedling products follow industry 1020 tray standard size (actual footprint: 11″ x 21″).

How many different thicknesses do fodder trays come in?

Available in 3 different thicknesses to meet all budgets and demands, these trays are perfect to slap an Insert in to get a jump on spring seed starting, or fill ’em up with soil and seeds for a handy fodder tray.

What are the 1020 trays?

Our 1020 Trays are the unsung hero of many a garden! Available in 3 different thicknesses to meet all budgets and demands, these trays are perfect to slap an Insert in to get a jump on spring seed starting, or fill ’em up with soil and seeds for a handy fodder tray.