Ongoing research

Tomato Blossom Drop Q. Why are my tomato blossoms falling off the plant? A. Tomato blossoms will drop off when temperatures fluctuate below or above the required temperature zone for any extended period of time.

Lawn Grubs Q. There are irregularly-shaped dead patches in my lawn and birds and squirrels are digging in the patches. What is killing the lawn and what are the birds and squirrels looking for? A.

Deep Watering Schedule for Fruit and Nut Trees Q. How do I make sure that my fruit and nut trees are getting enough water in this summer heat? A. To produce good yields, deciduous fruit and nut trees need some available soil moisture continuously from bloom to harvest.

Pre-emergent Application for Control of Lawn Weeds Q. Do I need to do anything now to prevent weed problems in my lawn next year? A. Apply a pre-emergent to control for Poa annua or annual bluegrass (it is an annual grass) now.

Citrus Splitting Q. The fruit on my citrus (especially my navel oranges) is splitting. What is causing this? A. Fluctuations in the weather, temperature and watering cause fruit split in citrus, especially in navel oranges.

Spurge Control Q. A flat-growing, slow-spreading purplish weed with a lot of stems that exude a milky sap is still everywhere in my garden: lawn, flower beds, cracks in the driveway, etc.. Will it cover everything? Will it eat Chicago? How do I get rid of this monster? A.

Citrus-freeze Protection Q. The weather report is predicting freezing temperatures this week. How do I protect the tender plants in my garden, expecially the citrus? A. First try to determine exactly which climate zone you live in. The Sunset Western Gardener book have pretty good maps of our area.

Fresno County Master Gardener Spring Garden Tour April 25, 2026 9-4 Rain or Shine Tickets are available for purchase online and at our outlets listed below.  $30 in advance, $35 day of tour.Rain or Shine We are busy preparing for this year's tour. Plan on joining us for a wonderful day touring a…

Master Gardener Classes for Kids! Join us!!! The Childrens Library Lessons are from 3:30 to 4:30 Activities are once a month: Sunnyside on the 1st Wednesday of the month 5566 E Kings Can...

Saturday April 26, 2025 Fresno County Master Gardener Spring Garden Tour Calling all gardeners and would-be gardeners! The Master Gardeners of Fresno County invite you to tour 5 beautiful and unique private gardens and our own demonstration garden, the Garden of the Sun.