The shallow rooted Ericaceous plants (rhododendrons, azaleas, leucothoe, mountain laurel, etc.) develop chlorosis when anything interferes with absorption of iron through the roots, or when iron in the plant is in an unavailable form.
(The shallow; rooted; Ericaceous plants) (anything; interferes; with absorption of iron) (iron in the plant; is; in an unavailable form)
The shallow anything iron in the plant
rooted interferes is
Ericaceous plants
with absorption of iron
in an unavailable form