I mix up gypsum, azomite, super greensand, langbeinite, sulfur, biochar, seaweed meal, humic and fulvic acid in big batches and put in each planting hole, then add lots of mulch on top. When the soil warms up, I add water soluble beneficial soil microbes with either MycoGrow from Fungi Perfecti or Plant Success Organics. I have added wood ash with no problem but conscious of not putting too much on any plant. I am going to experiment with Chilean nitrate of soda for increased nitrogen availability in cold soils. It is a natural source of nitrogen and micronutrients but it is high in salts, so will use during our winter rainy season, when the accessible nitrogen will be useful.
Planted over 200 trees this winter/spring at the farm with the above mix and they’re all doing well except for the gopher and rabbit damage.
Janet