House root infiltration

Question: home root infiltration

Good evening,
I would like to know whether transplanting a cycad or a kenzia a couple of meters away from the house can be a problem of root infiltration; after a bad experience with the wisteria I would like to avoid inconveniences ... and more specifically, which are the trees or plants to avoid in this sense?

House root infiltration: Answer

Dear Giuseppe,
there are many plants that present a bulky and very extensive root system, which can go to damage the foundations of a house, or the pipes; among the most common, of which we have all been able to observe the effects, there are maritime pines and elms, which can produce a very superficial root system, which ruins paths, pipes, all that it encounters in its path; another very invasive plant, the yucca, which is typically grown in pots, but in reality it can easily find a place in the garden: if in a pot, the container contains its roots, in the open ground the yuccas can develop wide roots, which also branch out near walls and paths. In general, however, most plants do not produce invasive roots, or rather, if the soil in the garden allows a plant to develop without problems, it is more likely that the roots will spread where there is land, rather than approaching the foundations of a house. In addition to this, it depends on where we place a plant: generally a tree is planted at least 3-5 meters from the house, and not in a flowerbed against the external walls. Having said this, cycas and kentia do not have very broad and powerful root systems, on the contrary, they have contained roots, which tend to develop around the stem of the plants themselves, without branching excessively. If next to these you intended to place other plants, such as the wisteria we are talking about, it is important to check that these plants have a good amount of soil available, deep and free of impediments: the wisteria produce a good root system, commensurate with the development of their ramifications; if they have good fresh and deep soil available, the roots will spread in the ground; if, instead, just below the wisteria is a rocky terrain, or other obstacles, it is clear that the roots will try to make space where they can, and also near the foundations of the house. I don't know if this is your case, but often the gardens are positioned immediately after building the house, covering the construction site, sometimes without removing the debris on the ground; therefore a land with remains of concrete, pieces of building material and other debris is covered with a meter (sometimes even less) of land, which unless expressly requested by the landlord, is the least expensive land possible. In a scenario of this type it is clear that the roots of any plant can be troublesome, because beneath the planting holes we find a long series of obstacles, which the roots will be forced to circumvent during their development. If your garden is of this type, or is positioned in an area with partly rocky terrain, then try to plant the plants in a suitable place, where they can enjoy as much substrate as possible.