Fast-growing hedge without maintenance: our tips for optimal growth
Choosing the right shrubs for a fast-growing hedge
Getting a fast-growing cedar hedge starts with selecting hardy, climate-adapted species. Some of the most popular choices include:
- Thuja occidentalis (Nigra)
- Thuja occidentalis (Brandon)
- Thuja occidentalis (Smaragds)
Tip: Allow 60 to 90 cm of spacing between plants for a tight hedge.
Exposure is just as important: the more direct light your shrubs receive, the more efficient photosynthesis and sustained growth will be.
Preparing the Soil for a Fast-Growing Cedar Hedge
A fast-growing cedar hedge depends above all on healthy and vigorous rooting. Even before planting, loosen the soil to a width of at least 60 cm and a depth of 30 cm to facilitate root penetration. Mix your original soil with mature compost or a phosphorus-rich fertilizer to stimulate root development. The addition of mycorrhiza (a beneficial fungus that creates a symbiosis with the roots) increases the surface area for water and mineral absorption, resulting in better vigour from the first season.
After planting, water thoroughly to remove air pockets around the root balls. Then install a suitable irrigation system, ideally a perforated hose or a drip irrigator, which ensures a constant supply of moisture without soaking the soil. Cedars appreciate a cool but not waterlogged soil: regular watering, on average 1 time a week for the first 2 years is often recommended depending on the climatic conditions.
Exposure to the sun remains a determining factor. The more direct light the hedge receives, the more efficient photosynthesis is, thus promoting rapid growth. If nearby trees cast dense shade, light pruning can make all the difference.
Maintaining a cedar hedge to accelerate growth
Even a so-called "maintenance-free" hedge requires targeted actions, especially in the first few years:
- Fertilization: apply a nitrogen-rich conifer fertilizer (e.g. 20-5-10) in the spring and renew slightly in mid-summer if the foliage becomes pale.
- Training pruning: prune only the sides from the second year to densify the hedge. Never cut off the head until you have reached the desired height.
- Irrigation: regular watering the first two years, on average 1 time a week, then deep watering in periods of drought.
Humidity control remains paramount. Even after full rooting (usually after two years), deep watering during periods of drought ensures continued growth. Also watch for insect pests such as the cedar leafminer. A preventive biological treatment can be applied in the spring if you observe signs of discoloration.
By combining these simple practices, your fast-growing cedar hedge will maintain rich color and consistent density, providing privacy and protection from the wind for many years to come.
To quickly visualize the ideal conditions, here is a small summary table:
| Essential factor | Key Recommendation |
| Annual growth | 30 to 45 cm (up to 60 cm in ideal conditions) |
| Spacing Between Plants | 60 to 90 cm (up to 1 m for longer life) |
| Planting Depth | 30 cm |
| Exhibition | Direct sunlight as much as possible |
Do you want to go beyond simple care advice? PURcèdres offers you a full range of services: cedar sales, hedge fertilization services, professional planting, careful hedge trimming and safe uprooting.
Our team is with you every step of the way to ensure a strong, dense and beautiful hedge, season after season.
Frequently asked questions about growing a cedar hedge quickly
How long does it take for a cedar hedge to reach its full height?
On average, a well-maintained cedar tree can gain 30 to 60 cm per year. Allow four to five years to obtain a dense green fence.
Can you really have a hedge that grows quickly?
Yes, as long as you prepare the soil from planting and choose naturally resistant varieties. However, regular watering is still essential for the first two years.
What is the best time for fertilization?
Spring, just before the period of strong growth, is perfect for a nitrogen supply that will support the growth.
What mistakes slow down the growth of a hedge?
Irregular watering, too severe pruning or unsuitable fertilisation are the main obstacles to rapid growth.
How do I know if my hedge is getting enough light and water?
Look for the colour: pale foliage or brown tips indicate a lack of water or sun. Adjust watering and clear shaded areas.