Should i use concrete or spikes to erect a garden arch?

Using concrete is generally a better option for erecting a garden arch, as it provides a stable and long-lasting foundation that can withstand weather conditions and the weight of the arch. Spikes can be less secure, especially in areas with loose soil or heavy winds. However, if you're looking for a temporary solution or plan to move the arch later, spikes might be sufficient. Ultimately, consider your garden's conditions and how permanent you want the installation to be.