Question
I purchased two parasol plants one month ago(June). They are in separate pots...both in the same kind of (extra large) ceramic pot, same soil, same light.However, one of them has had most all of it's leaves turn yellow and drop off.  What's going on ????

thank you
Cindy

Answer
Cindy,

Here are some common problems with many plants including your mandevilla plants.

PROBLEM DESCRIPTION/SYMPTOM SUGGESTED TREATMENT
BROWN LEAVES Leaves develop brown tips and margins. Plant growth may be checked. May be caused by buildup of mold or salt, dry soil, or low humidity. Leach salt from soil by running water through pot. Increase humidity by placing pebbles or marbles and water in a tray under the plant.

YELLOW LEAVES Old leaves turn yellow, brown-spotted, dry or curl and drop. Leaves yellow but remain firm. Caused by overwatering, poor drainage, excessive light, or too much lime in soil or tapwater used to water plants. Limit light source and aerate soil (gently poke small holes down into soil), water less frequently. Remove damaged parts of plant. Use filtered water when watering and replant using acidic potting mix.

LEAVES DROPPING Yellow and dropping leaves and buds at various levels on plants. Can be caused by either over or under watering, shock due to sudden change of light or temperature, mealy bugs, spider mites or scale insects. Change your watering procedure. Remove plant from drafts, and provide better lighting. If this doesn't work, see Formulas for Insects in the Garden for remedies for insect damage.


One plant could be suffering more transplant shock than the other. If you figure it out and need more suggestions if it turns out to be insects feel free to write again. Good lluck.

Darlene