Your listing of 6.0 - 7.5 for Petunias is incorrect. Petunias have a high Fe need and so should have a lower pH. Try 4.5 - 6. I am the retired Director of Horticulture at the Mass. Horticultural Societky. Reply
Your listing of 6.0 - 7.5 for Petunias is incorrect. Petunias have a high Fe need and so should have a lower pH. Try 4.5 - 6.
I am the retired Director of Horticulture at the Mass. Horticultural Societky.