yellow leaves on rugosa Magnifica

Chickadeebower's picture

yellow leaves on rugosa Magnifica (post #16616)

 I am continuing to have trouble with yellowing leaves and browning of the edges.  Appearing "burned" edges.  I have tried the "Tea" fertilizer, high nitogen, blood meal, epsom salts, green sand.  What else could the problem be?  I have soil with a high clay content. Thanks for your input.