How To Grow Big Healthy Seedlings

To grow big plants, you’ll need to give your plant the best start possible.

What does Plant Propagation mean?

Plant propagation is the process of creating new plants from a variety of sources e.g. seeds, cuttings, or other plant parts. In this article we will discuss the best implements and inputs needed to achieve high success rates in seed germination.

It seems simple; bury a tiny seed into the soil and, over the course of time, out comes a big plant. However, some things are easier said than done. There are numerous factors why plants won’t grow to its fullest potential over its lifetime, but the best we can do is to ensure we give the plant the best start possible by making sure the seeds are germinated properly.


What do seeds need to sprout?


Seeds need hydration to stimulate embryonic activity. Make sure grow media is moist, not “wet”.


Germination occurs at its most likely in a warm environment. Not cold and not hot.


Seeds sprouting need access to air exchange. Use a grow medium with good aeration.


Most seeds prefer a dark environment to sprout. Avoid burying seeds too deep.

How to Propagate Seedlings

Seeds Sprouting

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To grow high yielding plants, start with good quality seeds from a reliable source. Select varieties that best suits your growing environment and growing system, whether conventional in the ground, plant beds or containers, or for your hydroponics or aquaponics system.

Although some seeds will keep for several years if stored properly, it is advisable to purchase only enough seed for the current year’s use. Good seed will not contain seed of any other crop, weeds, or other debris. Seed manufacturers take great care in producing seeds, some even applying a coating of fungicidal protection and ensuring an airtight seed packaging to keep seeds dormant and prevent from dehydrating.

In addition to seed stock quality, the use of the right tools and materials for seed propagation is significant to ensuring high germination rate. But what are these? Know more about them below.


A seedling tray is extremely useful to propagate seedlings from seed, it provides an organized method to germinate seeds using cells filled with seed germinating medium. Different plants require different cell volume sizes. Growers generally choose seedling trays depending on the planned transplanting timeline and crop selection.

Seedling Trays 50 Holes

  • Dimensions: 53cm x 28cm x 5cm (L x W x H)
  • Top Diameter: 4.5cm (1.75 inch)
  • Bottom Diameter: 3.5cm

Seedling Trays 72 Holes

  • Dimensions: 59cm x 30cm x 3cm (L x W x H)
  • Top Diameter: 4.2cm
  • Bottom Diameter: 3.1cm

Seedling Trays 104 Holes

  • Dimensions: 56cm x 22cm x 5cm (L x W x H)
  • Top Diameter: 4cm
  • Bottom Diameter: 2.5cm

Seedling Trays 104 Holes

  • Dimensions: 56cm x 22cm x 5cm (L x W x H)
  • Top Diameter: 4cm
  • Bottom Diameter: 2.5cm

Cocopeat 2kg

The best organic grow medium for seeds or potted plants. Click to buy!

Vermicast 3kg

Improves crop yield, bunch sizes, fruit set, fruit storage, trunk diameters and more. Click here to buy!

Carbonized Rice Hull 2kg

Carbonized Rice Hull (CRH) seed germination ready mix. Click to buy!


The best grow medium for seed germination using seedling tray containers are cocopeat (cococoir), carbonized rice hull (CRH) or Vermicast. Both are organic by-products from natural sources. They are characterized by the following properties:


  • Good water absorption and moisture retention.
  • High organic matter (OM) content.
  • Provides aeration in rootzone to allow roots and rhizomes to expand.
  • Great as a buffer due to neutral pH.
  • High Cation Exchange Capacity (CEC) to retain nutrients of both + and – charges, enabling better nutrient uptake.
  • Contains natural elements of macro and micro nutrients.
  • Harbors beneficial bacteria and encourages growth of mycorrhizae.


1020 Trays with Humidity Domes are the most preferred seedling tray container for microgreens or to prepare seedlings in 2″ net pots for hydroponic NFT systems. The tray is durable and can be reused many times over. A humidity dome creates a warm, moisture-rich, humid environment that helps seeds germinate rapidly. The dome comes with adjustable vents to prevent high chamber temperatures and facilitate air exchange. These trays are adaptable in both outdoor and indoor environments. Used outdoors, the dome gives added protection against pests, bugs, and birds, while offering protection against the rain. In low-humidity indoor environments, young seedlings grow rapidly and are preferentially used to cultivate microgreens for quick servings of healthy, clean salads.

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