Reisenauer (1976) indicated that ninebark is salt tolerant
to about 355 mg L1 of Cl, although data by Gils
et al. (2005) suggest tolerance near 100 mg L1 of Cl and
near 70 mg L1 of Na. In the present study, tolerance of
the three species to Cl and Na concentrations was near
120 mg L1, and to SO4 concentrations near 400 mg L1
(Table 2). In a different recirculating experiment (data
unpublished) we replenished compost leachates by topping
up at two-week intervals with the same wastewater. Using
this procedure, we attempted to grow three containergrown
species [forsythia (Forsythia · intermedia Zab.
‘Lynwood Gold’), cotoneaster (Cotoneaster dammeri
C.K. Schneid. ‘Coral Beauty’), and sumac (Rhus typhina
L.)] supplied solely with recirculated nutrients from
wastewater mixtures (SUBBOR + mushroom farm and
SUBBOR + turkey litter leachate). However, persistently
high Na and Cl levels (125–255 and 144–282 mg L1,
respectively) were a problem. While all species grew best
with control stock solution (