[header] How to buy saguaro cactus [title] Buy saguaro cactus seeds from a seed distributor. [step] Saguaro cacti reproduce through seeds, which can be harvested from the plant's red fruit. One saguaro can produce as many as 40 million seeds over the course of 175 years. 
Several online seed distributors sell saguaro cactus seeds, which are tiny black seeds about the size of a pinhead. [substeps] Choose saguaro cactus seeds as an inexpensive way to grow the plant.