The University of California's Master Gardeners recommend any standard vegetable fertilizer for use with potted strawberries. The fertilizer should be mixed thoroughly through the potting mix or applied on the surface if it's a liquid fertilizer. You may consider using a slow-release vegetable fertilizer to avoid having to reapply fertilizer in the near future.
About this Author
Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.