My blueberry plants exhibit iron and magnesium deficiency. We amended the soil pH and used an organic fertilizer last year. We want to keep our plants certified organic. I know that berries need a lot of minerals, but I don`t how to find just what minerals to use and if they would be considered organic. I used a foliar seaweed/epsom salt mix last fall to try to keep them healthy and some still lost leaves. I would like to know what to use this spring to keep them healthy and growing.
Organic Minerals for Blueberries
Certified GKH Gardening Expert
Really, your best bet is adding good amounts of compost, as this will have a wide variety of minerals and nutrients the plants need. You may want to look into making compost tea. This article will help with that: https://www.gardeningknowhow.com/composting/basics/compost-tea.htm