rock garden

How to Prepare a Rock Garden

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How to Start your Own Seedlings

Rock Garden Preparation

A rock garden is a great way to show off unique plants against a natural setting without too much hassle. Rock garden plants should grown no taller than 24” (60 cm) at there mature height. The plants should be about the same scale as the rocks. It is the appearance of colorful compact plants set among stone that draws people to rock gardening. 

Success with most plants requires care in the choice of soil and rock. The rocks can be entirely or partially below the soil surface, and the majority of the plants require well-drained soil. If your soil is heavy (clay based) amending with compost and sand will help with drainage. Sandy soil may need to have top soil and compost added to retain some moisture. Our stone yard has a large selection of natural stone boulders and rocks to start your rock garden project. 

Scree is rocky soil often associated with alpine habitats, which provides excellent drainage and adequate moisture. Mimicking this rocky soil will achieve the best results. A basic scree mixture consists of equal parts of coarse sand, grit, and top soil. This scree mixture produces good results if not allowed to dry out and occasionally fertilized as nutrients are depleted. A “rich” scree may be made “lean” by increasing the amount of sand, grit or both. 

Come in and visit us to ask our knowledgeable staff about which supplies you will need to make your rock garden a success.

     Examples of Rock Garden Plants


Anemone syverstris, Arnucus

Aesthusifolius, Campanula,

Dianthus, Festuca, Galium,

Persicaria, Phlox subulata,

Sedum Hybrids, Sempervivum


Acer palmatum (Dwarf), berberis

thunbergii, Chamaesyparis

obtusa (Dwarf), Cotoneaster

apiculata, Ilex crenata,

Juniperus procumbens, Picea

abies, Pinus Mugo

rock garden


Steps to Start your own Vegetable or Annual Seedlings

1. Before you get started, it's important to gather the proper supplies. You'll need seed trays, pots, bottom trays, Fafard seedling and sprout mix, clear dome lids, grow lights, and plant tags

2. Moisten and loosen potting mix until it is thoroughly damp, but not dripping wet.

3. Fill pots to the top with potting soil, tapping firmly against the table as you go, so the soil settles and there are no air pockets trapped in the tray cells.

4. Label the tray with the plant name and date sown.

5. Make holes in each cell using your finger, or a pencil. A general rule of thumb is to plant the seed twice as deep as it is big. Review the seed package to find out the optimal seed depth.

6. Drop 1-2 seeds into each hole until the tray is completely full.

7. Cover the tray with a light dusting of Fafard seedling and sprout mix, making sure all seeds are covered.

8. Set freshly sown trays into a plastic tub with an inch of water in the bottom and let them soak up the water from below. Remove once the soil surface is evenly moist. Seed trays should not be watered from overhead until the plants have their first set of true leaves, as one strong blast from the hose will wash tiny seeds away.

9. Cover trays with a clear plastic dome and set onto a 24 degree Celsius Planters Pride Heat Accelerator Mat or in a warm corner of the house, consistently above 18 degrees Celsius.

10. Check trays daily, and once seeds have sprouted, remove plastic dome lids and move the tray off of the heat mat to a bright space such as a greenhouse or under grow lights. If using lights, make sure that they are suspended a few inches above seedlings and put them on a timer, making sure to give plants 14-16 hours of light a day. As the plants get taller, be sure to keep raising the lights so that they are 2-3 inches above the tallest plant.

11. Check seedlings daily and water when the soil appears dry. As young plants grow, they need to be fed. Following the label instructions, add the correct amount of liquid fertilizer to your watering can and drench plants weekly.

12. When seedlings outgrow their trays, planting them into larger containers will promote more growth. If the weather is warm enough, start transitioning them outside.

13. It’s important to “harden off” young plants before putting them into the garden, otherwise they will be shocked by the sudden change in temperature. Set trays in a sheltered spot outside, increasing the amount of time they are out each day. This helps the young plants acclimate to outdoor temperature fluctuations. Once all danger of frost has past they can be planted into the garden. In Hamilton anytime after May 24 is safe to plant all annuals and vegetables outside.

Steps to Start your own Vegetable or Annual Seedlings

  • Top quality seed
  • Fafard seedling and sprout mix
  • Pots, Seedling Trays, or Seeding Pellets
  • Greenhouse Kit
  • SunBlaster LED or florescent grow light
  • Plant Pride Heat Accelerator Mat
  • Plant tags
  • Easy Grow - One Step Fertilizer