An evaluation of conventional and subirrigated planters for urban agriculture: Supporting evidence

Urban Farm DB summary

This study compared crop yields, quality and labor input for subirrigated planters (SIPs), a sack-garden variant, and two conventional raised beds over one season at one location, growing cayenne pepper, cherry tomatoes and kale. Both the SIP beds and conventional beds with a soilless growing medium were more productive than conventional beds with a topsoil-and-compost mix, and tomato yield in the SIP without a root barrier exceeded both conventional beds. Most of the higher-cost beds generated a positive revenue stream in the first season, suggesting that investing in SIPs or in soil suitable for raised beds is worth the higher initial cost.