Answer: Since you didn't give any specific plant, it's difficult to answer your question except in general terms. Poor soil drainage will affect most plants; root rot is the ultimate problem, caused by suffocaton of the roots. Likewise, insufficient water drainage will suffocate plant roots, except those plants that like wet feet. Improper temperature will result in either cold damage (freeze back) or heat stress; again, it depends upon the plant. Phosphorous deficiency can cause reddening of the foliage or lack of bloom/fruit production. Overwatering - same as poor soil drainage. Inadequate lighting will retard growth. Iron deficiency will cause pale leaves with bright green veins; nitrogen deficiency will result in pale leaf color; salt damage will show up as burned leaf tips and will ultimately kill most plants.
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