Iron oxide nanoparticles have extensive applications in many areas such as dye removal, ground water purification, catalysis of reaction, antimicrobial agents, MRI agents, drug delivery applications etc. In this study, hematite particles were fabricated employing Hibiscus rosa-sinensis and Allium sativum extract and end products were assessed appropriately. Comparisons of the as-synthesized particles were drawn on the basis of crystal structure, particle morphology, optical properties, stability, dispersity, magnetic properties and functional groups present on particle surface. Co-precipitation of nanoparticles was achieved approximately at 7 pH with the help of bioactive compounds present in plant extracts. Experimental set up was simple and inexpensive and completed in 30 min and yielded ultra-small, stable and superparamagnetic particles. Compared to hibiscus, garlic extract yielded smaller particles having better colloidal stability and higher saturation magnetization. Green synthesized particles displayed promising potential to be used in various biotechnological applications. © 2019 World Research Association. All rights reserved.