Ornemental Agroforestry - With a Twist
Most conventional ornamental landscaping is far more dependent on herbicides like Roundup and synthetic fertilizers than most people realize. The quantities are lower than in industrial agriculture, but the dependency is often similar. In ornamental hedge maintenance, it’s common practice to apply chemical fertilizer after pruning -especially since hedges are trimmed frequently to maintain that “perfect” formal appearance. Then there’s the establishment time. Depending on the species, a conventional hedge can take anywhere from 4 to 10 years to properly fill in and reach the desired density. Over time, another issue comes up : repeated pruning in exactly the same place year after year can cause plants to become overly woody. This often leads to gaps, reduced vigor, disease pressure, and eventual plant losses. And honestly... most hedges end up looking pretty boring anyway. At my job, I plant several hundred meters of ornamental hedges every year. Instead of following the conventional landscaping model - which here would require more irrigation and could take close to a decade to establish properly; I went for something else : Rather than planting a single-species hedge, I designed a stratified living hedge, combining: - Emergent and high trees - eucs, acacias, grevillea robustas, bottle trees, casuarinas, mulberry - Medium and low strata shrubs - myoporum, pittosporum, tree germander, viburnum, boldo. The result is already seen after 3 months : instead of waiting years for density, the space fills visually in about a year and a half or less. To accelerate the effect even further, I also introduced succulent plants - tree aeoniums (Aeonium arboreum). These create a sense of fullness within the first 6 months. As the longer-term species establish, these pioneers can be chopped and dropped, feeding the system and making space for the next stage of succession. I also planted white mulberries every 5 meters. The idea is they’ll eventually produce fruit for guests walking along the path. As well, I will plant some stonefruit seeds like apricot or plums, probably 1 to 2 years down the line.