The Ventura County Master Gardeners have scheduled University of California Farm Advisors and other experts in agriculture and horticulture to lead a series of four seasonal workshops designed to educate the home gardener. These Saturday events will be held at the Hansen Agricultural Center (aka: The Faulkner Farm) in Santa Paula.

“This is an exciting learning opportunity open to the public,” said Tina Van Coops, Ventura County Master Gardener and workshop coordinator. “It is not often that home gardeners have the chance to take informal Saturday classes from such experienced and trained instructors.”

The first in the series of seasonal workshops, called "Summer in the Garden," will take place on May 17, 2008. Larry Yee, Director of the Ventura County Cooperative Extension, will present "Where Your Food Comes From": a fascinating review of the growing local food movement. Dr. Ben Faber, UCCE Advisor, will teach a session on "Avocados and Citrus.'

Other topics for that day include "Rose Care," ''Tomato and Vegetable Gardening," and a timely presentation on 'Summer Tasks for the Garden."

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An artichoke (Cynara scolymus or C. cardunculus) is a giant thistle which becomes a beautiful flower. Well, it could become a beautiful flower--if we didn't pick it as a flower bud and eat it as a vegetable.

Artichokes, native to the Mediterranean region, were later introduced to Southern Europe and Asia. The artichoke has dramatic and sculptured gray green foliage that is very attractive in your vegetable garden. In fact, this vegetable is beautiful in your ornamental garden, too!

An artichoke’s overall form is almost like a fountain and needs up to 4 feet of space for full growth. It likes full sun, cooler temperatures and moist soil. If you live in a very hot zone, plant it in the shade. Mulch under the plant to help maintain the moisture that it loves.

At planting time, plant dormant roots or young plants with the root shoots just above the soil level and then mulch. Water at least once a week, keeping the root system moist.

Aphids, snails, slugs, and earwigs tend to be the artichoke “pest of the day.” Blast the aphids and earwigs off with water. We recommend Sluggo for the snails and slugs.

The best time to harvest your artichokes is once the edible flower buds are 2-4 inches in diameter. Cut off the bud, including 1.5 inches of stem with the bud. At the end of the season, cut back the old bearing stems/foliage to near ground level and mulch around the remaining plant. Don’t forget to give your artichokes a well-balanced fertilizer such as Whitney Farms All Purpose Fertilizer.

Aphids come in a number of sizes and colors, winged and non-winged. All are pesky little insects to gardeners. Why are they considered a pest? Aphids are "suckers"--they suck juices from the plant leaves and stems. Some can also transmit plant viruses via that sucking mouth-piece.

What else do we know about aphids? Well, they certainly are not Speedy Gonzales! They are slow-moving, soft-bodied insects that suck juices from our plants, and excrete a clear sugary liquid that we call "honeydew." Frequently, in the presence of an aphid-infected plant, you will notice a stream of ants working busily around the aphids. They are protecting the aphids because these ants want access to the honeydew.

Also, it is upon honeydew that sooty mold can grow and leave a black, sooty deposit on the foliage of the infected plant. Many customers have mentioned that they thought this deposit was pollution or dirt. It's not pollution or dirt--it's a fungal mold.

Aphids have many natural enemies in our gardens. Adult and larval forms of ladybugs and lacewings, syrphid flies, soldier beetles and parasitoid wasps (these guys are tiny, not your average wasp) all love to eat aphids. A good approach to aphid management begins with maintaining a healthy garden and encouraging these beneficial insects to make your garden their home. This is done through plant diversity and health.

Another very easy method of aphid removal is simply using water to knock them off the infected plant. If the aphid is in the process of probing/sucking a juicy stem when you knock it off--and it probably is doing just that--the mouthpiece will be broken and the aphid will no longer be able to eat. See what a simple pest control water can be--and a safe method at that?

We carry spray oils and other insecticides that can be used for more severe infestations--ask us which is best for your needs.

John Hyland
Green Thumb Garden Pro

What’s the best way to over-seed a lawn?

Answer:
That depends on whether it is the entire lawn or just a bare spot. The best time to over-seed is early spring and early fall.

For bare spots, make sure to remove any old dead growth that still exists. Then scratch the soil surface at least 1-2 inches deep and level off. Apply your seed and cover with 1/4 inch of top dressing, such as Kellogg's Topper. Make sure to keep the area moist at all times until the seed has germinated and rooted. You should be able to mow the spot (on a high level setting) three weeks after the seed germinates and is visible.

Before over-seeding an entire lawn, mow your lawn to half its normal height. We recommend dethatching your lawn and removing all thatch debris before applying new seed. Then over-seed at the recommended over-seeding rate on the package of your lawn seed.

Cover the entire lawn with a 1/4 inch layer of the same top dressing mentioned above. Switch your watering cycle to at least twice daily (short cycles) the first two weeks, once per day the second week, every second day the third week and then back to your normal watering cycle from then on.

Try not to mow for at least two weeks after applying seed. Then do so at a higher than normal level setting until the new grass is well established.