How far away should you plant a cedar hedge?

The spacing between the plants determines the health of the hedge in the long term. A well-calculated interval ensures sufficient air circulation, reduces the risk of disease and promotes strong rooting. This provides each cedar tree with the necessary water and nutrients, resulting in homogeneous growth and a dense, aesthetically pleasing hedge with no holes or sparse areas.

The right distance between cedars also reduces maintenance requirements. When the roots do not compete with each other, cedars are more resistant to periods of drought and require less prolonged watering. In addition, good spacing makes annual pruning easier: gardeners can move between plants, trim sides precisely, and remove dead branches before they affect the entire hedge.

This pension plan has another advantage: it extends the life of your hedge. Cedars that are too tight can wither after about ten years and reveal voids that are difficult to fill. By respecting the recommended distances from planting, you protect your investment for several decades.

Recommended distances for a cedar hedge, depending on the desired effect

To determine the ideal spacing, consider the style of hedge you want:

• Dense, fast hedge: 60 to 90 cm (24 to 36 in) between each plant
  
• More ventilated or natural hedge : 1 to 1.2 m (3 to 4 ft)
• Isolated or ornamental cedars : 1.5 to 2 m (5 to 6 ft)
  

This spacing is particularly applicable to the varieties offered by PURcedars, including black cedar (Thuja occidentalis 'Nigra'), which is the preferred choice for those looking for a dense, green hedge year-round. With its deeper and more intense green foliage than other varieties (Brandon Cedar, and Emerald Smaragd Cedar), this cedar creates enhanced privacy while bringing an elegant touch of naturalness to your landscaping.

For a dense and fast hedge, the ideal interval is about 24 inches (60 cm.) on center, which also makes it easier to calculate the number of plants needed (count one cedar tree for every two linear feet of hedge).

For a windbreak effect, some landscapers prefer to bring the plants slightly closer together at the beginning (around 55 cm), but only when there is regular maintenance and the soil is rich in nutrients.

Steps to Plant a Cedar Hedge Properly

After you've set the distance to your cedar trees, set the stage. Dig a trench 45 to 60 cm deep and about 60 cm wide, then mix your original soil with compost and rooting fertilizer. The addition of mycorrhizae increases the roots' absorption capacity and promotes faster growth. Place each plant at the chosen distance, making sure the collar is level with the ground.

Water thoroughly to remove air pockets, then install a perforated hose or drip system to maintain consistent humidity. Finish with a 5 to 7 cm layer of mulch, without touching the trunk, to conserve moisture and limit weeds.

Also take the time to check the pH of your soil: cedar prefers slightly acidic to neutral soil (pH 6 to 7). If the pH is too high, an addition of organic matter such as sphagnum peat moss can restore the balance. Finally, provide light staking for young plants exposed to the prevailing winds to protect their roots during the first seasons.

Looking for complete support rather than simple maintenance advice? At PURcèdres, we offer a turnkey service: cedar sales, hedge fertilization service, expert planting, precise hedge trimming and professional uprooting.

From soil preparation to the top of the crowns, our team watches over every step of the way to provide a healthy, dense and elegant hedge all year round.

The best time to plant cedars

The time of planting plays an essential role in the recovery of the roots. Spring, from May to early June, offers warmer soil and abundant natural moisture. Early autumn, from the end of August to the end of September, is also ideal: the cooler temperature and regular rainfall allow for solid rooting before winter.

In some colder regions, extra mulching before the first frost helps the young roots get through the winter. If you must plant in the summer, make sure for sustained watering and thicker mulch to avoid water stress. However, avoid periods of high heat or soggy soils after heavy rains, as this can lead to fungal diseases or root rot.

Frequently asked questions about planting a cedar hedge

How deep should the trench be provided?

Allow 45 to 60 cm to provide a good root volume.

Should you use mycorrhizae when planting?

Yes, it improves water and nutrient absorption, promoting faster growth.

How much water after planting?

Deep watering immediately, then regularly (two to three times a week) the first year, depending on the weather.

Can you mix different varieties of cedars in the same hedge?

This is possible, but growth and color can vary, resulting in a less uniform look.

How can I check that the chosen spacing is sufficient?

Make sure that the mature foliage of cedars will not overlap excessively depending on the variety.