<p>In many production-oriented businesses today, there is a growing trend to replace non-sustainable raw materials with environmentally friendly alternatives. In contrast to synthetic fiber reinforced composites, natural fiber reinforced composites are generally exhibit lower resistance to mechanical loads and chemical impacts. Consequently, researchers have been working to enhance the strength of natural‑fiber composites for a variety of applications. In this work, silicon carbide (SiC) particles were employed as fillers to investigate the morphological features and mechanical performance of epoxy composites reinforced with <i>Elettaria cardamomum</i> (cardamom) fibers. The primary objective of this work was to demonstrate the potential of natural fibers by incorporating biodegradable, eco-friendly cardamom fibers into polymer composites. The fibers from <i>Elettaria cardamom</i> plants pseudo stems after being chopped and alkali-treated were used to prepare composite samples via a hand‑lay‑up technique. In this case, 5% silicon carbide (SiC) particles with a granule size of 4.5&#xa0;μm were mixed with 30% <i>Elettaria cardamom</i> fibers to fill the composites. The mechanical characteristics including tensile, flexural and impact strengths of <i>Elettaria cardamom</i> fiber reinforced epoxy composites containing silicon carbide particles were then evaluated. Field-emission scanning electron microscopy (FESEM) was employed to examine the internal surface morphology and fiber-matrix adhesion of the composites both prior and after mechanical testing. The results indicated that the addition of SiC particles significantly improved the tensile, flexural, and impact resistance of the epoxy-cardamom fiber composites, highlighting the feasibility of using biodegradable natural fibers in high performance composite materials.</p> Graphical abstract <p></p>