Jacaranda leaves are turning yellow: what to do about yellow jacaranda leaves

If you have a jacaranda tree that has yellow leaves, you’ve
come to the right spot. There are a few reasons for a yellowing jacaranda.
Treating a yellow jacaranda means you need to do a little detective work to
figure out why the jacaranda leaves are turning yellow. Read on to find out
what to do about a jacaranda turning yellow.

Why are My Jacaranda Leaves Turning Yellow?

Jacaranda
is a genus of 49 species of flowering plants native to tropical and subtropical
areas. They thrive in full sun and sandy soil and once established are fairly
drought tolerant and have few insect or disease issues. That said, they can,
especially young and newly transplanted trees, begin to turn yellow and drop
leaves.

Young plants are also more susceptible to cold temperatures
than mature trees. Mature plants can survive down to 19 F. (-7 C.) while tender
young trees may not survive such temperature dips. If your region gets this
cold, it is advisable to move the tree indoors where it will be protected from
the cold.

If the jacaranda has yellow leaves due to a lack or surfeit
of water, there are a couple of ways to try and treat the problem. First, you
need to identify if the issue is too much or too little water. If the jacaranda
is stressed from too little water, the leaves yellow, wilt and drop
prematurely.

Those getting too much water are more likely to have smaller
than normal leaves, branch tip die-off and premature leaf drop. Overwatering
also leaches minerals from the soil, which may also be a factor with a sick
tree.

Treating a Yellow Jacaranda

During the spring and summer months, jacaranda should be
watered slowly and deeply once every two weeks. During winter when the trees
are dormant, water just once or twice.

Don’t water at the base of the trunk but rather around the
dripline where rain naturally falls from the outer branches. Watering at the
trunk may foster fungal infections. Apply a layer of mulch around the tree as
well to retain moisture and keep roots cool; keep the mulch away from the trunk,
however.

On the note of fungal diseases, be sure to plant the tree so
the crown is not immersed in a hole that might hold water, resulting in crown
rot.

If the problem does not seem to be related to irrigating, it
might be due to excessive fertilizing. Over
fertilizing may result in a jacaranda that has yellow leaves,
specifically yellowing leaf edges and dead leaf tips. This is because of an
excess or buildup of minerals or salts in the soil. A soil
test is the only sure way to diagnose this problem.

Folks that keep their jacaranda indoors during winter months
due to chilly temperatures need to be sure to harden
off the tree before moving outside for the summer. This means moving
it outside into a shaded area during the day and then back in at night, and
then into an area with morning light and so on for a couple of weeks, gradually
exposing the plant to full sun.

Lastly, if a yellowing jacaranda is a recently transplanted
sapling, the issue may be transplant
shock. Try slowly watering in regular applications of either a B
vitamin or Superthrive every few days until the tree looks better and has
established.

Image nduellman