Question
Hi,
I live in Mitla, Oaxaca, MX @ 6,500 ft altitude.  It is a high, semi-desert valley.  Day temp up to 80 & 40 at night.  
My gardenia is a potted outdoor plant is is doing well in spite of the lack of humidity.
But, the leaves have "water stains" on them and I'm wondering what to do.  Any suggestions?
Thanks!
Heidi

Answer
Heidi,

    Make sure when you water the plant you do not get any water on the leaves as this will lead to leaf spotting especially if the drops are on the leaves when the sun shines on them...Water the plant while it is in the shade or after the sun goes down...The drops should be gone by morning...Again do not get water on the leaves...Do not let it go too dry between waterings or you will have more pest problems...
   Water your plant based on how much it weighs when thoroughly watered VS when it is ready to be watered again. Plants die from too frequent waterings (or going too dry in between waterings), not from how much water you give them at one time. Pick up or lean the pot and feel how heavy it is after watering it thoroughly. Don't water it again until it feels considerably lighter and the top of the soil is light in color...You can always poke your finger into the soil if you are not sure...Depending on plant types, sunlight exposure and pot size plants will need water at many different rates from once a day to once a month or more...
Hope this helps.
Rick in New Jersey