It's generally not recommended to store spice powders next to tea and coffee due to potential flavor contamination and aroma absorption. Store them separately in airtight containers.
Tea and coffee, especially ground coffee, are highly absorbent and can easily pick up the strong aromas of spices like cumin, chili powder, or turmeric. Similarly, delicate spices like saffron or cardamom can absorb the flavors of coffee or tea, diminishing their own unique profiles. This cross-contamination can significantly alter the taste of your beverages and spices, leading to an undesirable culinary experience. To prevent this, it's best to store spices and tea/coffee in separate areas, ideally in airtight containers. This minimizes the transfer of aromas and flavors, preserving the integrity of each ingredient. Consider using dedicated cabinets or shelves for each category. Furthermore, ensure that the containers are properly sealed to create a barrier against moisture and air, which can also degrade the quality of both spices and tea/coffee.
To further protect your spices and tea/coffee, consider storing them in a cool, dark place away from direct sunlight and heat sources like the stove. Heat and light can accelerate the degradation of flavors and aromas, even within airtight containers.