Your welcome, Vee!
Here is a little blurb I came across which talks about salt
http://mrec.ifas.ufl.edu/folia...
"1) Marginal or tip scorch of foliage
Symptoms -
Leaves turn brown at or near the tip and margin. There is usually a transition zone of yellow between necrotic and healthy tissue.
Control -
Avoid excessive soluble salts in root zone and excessively high light intensities and temperatures. Avoid use of superphosphate fertilizers in stock or finishing plants since it supplies fluoride in toxic amount"
Here is a photo of a plant that I trimmed in the fall as it looks now under lights with some fertilizer.
This maranta is 'Beauty Kim'
