Do You Have Ripe Tomatoes Yet? By Joyce D’Agostino

Photo by Joyce D'Agostino

Do you have the best tomatoes on your block – but they’re still green? Are you wondering when you will get that first ripe tomato?

You’re not alone with these concerns. It seems many of us work hard to get our tomatoes started so that they are strong healthy plants when you are ready to set them outside, with the hope of early and abundant harvest only to find that they are slowed down by weather issues.  It seems we get by the cold and wet springs only to suddenly be exposed to the hot and dry late spring and summer weather.

Tomato Problems: Bacterial Diseases in Tomatoes by Mary Small

Photo by bitkisagligi.net

Photo by flickrhivemind.net

Moist weather in spring and summer can contribute to the development of bacterial diseases on tomatoes, just like it does for fireblight. The two diseases most often seen in moist years are bacterial speck (Pseudomonas syringae pv.tomato) and bacterial spot (Xanthomonas campestris pv. vesicatoria).

Leaf symptoms look the same for both diseases. Small water-soaked spots form and grow to about 1/8” in size with yellow halos. The centers are light brown and often tear; yellow halos are common. On more mature plants, infections are concentrated on the older foliage. Spots may also appear on the fruit pedicels.

Tomato Problems: Blossom End Rot by Carol King

Blossom end rot, photo courtesy CSU Extension

It seems like there is lots of tomato conversation lately about blossom end rot. So what is this nasty sounding ailment? It starts at the end where the blossom was and begins turning tan, then a dry sunken decay sets in. The lesion enlarges, turns to dark brown to black and becomes leathery. Thus the blossom end begins to rot.

It shows up especially in the first fruit of the season and after the fruit is well on its way to development. In severe cases, it may completely cover the lower half of the fruit. Both green and red fruit develop it. It’s not a pest, parasite or disease process but is a physiological problem caused by a low level of calcium in the fruit itself. In other words, dear gardener, IT’S ALL YOUR FAULT!

Mid-summer Lawn Care: Fertilizing, Aerating and Mowing by Donna Duffy

Mid-summer can be tough on turf. In addition to watering efficiently, give consideration to fertilizing, aerating and mowing practices. Following are tips from Tony Koski, CSU Extension Turf Specialist.

Growing Elderberries in Colorado by Donna Duffy

Elderberries, photo courtesy Plantalk

Elderberry is a remarkable shrub or small tree of several species and many forms and colors of foliage, flowers and berries It has been found in Stone Age and Bronze Age excavations, was one of the sacred trees of the Druids, and has been used as a medicinal herb by early Europeans, native Americans and modern herbalists. However, it has not been popular in landscapes until recently when selections have been made for special leaf colors and textures. And now home-food and food-medicine gardeners want elderberries because scientific research has verified herbal lore that elderberries have health benefits. The Wall Street Journal identified elderberry with seven other berries as “nutritional royalty.”

Is Plant Fertilizer Safe for Pets and Children? by Joyce D'Agostino

Read the Fertilizer Label Carefully and Follow Directions.

I recently received a call on the JeffCo Extension Master Gardener hotline from a consumer in Jefferson County who wanted to know which fertilizer that we could recommend to him that was “pet safe”. He planned to use fertilizer on his lawn and garden in the future and wanted to be sure that his pets would not be harmed should they be exposed to the fertilizer when it was applied.

While we do not endorse or promote a specific product, my first suggestion to him was to be sure that he bought his fertilizer from a reputable source and carefully read the label.  Some consumers may not be aware that the label information on products like fertilizer, pesticides and herbicides are actually legal statements. The companies that make these products are obligated to outline on their label the components of their product, how it should be used and any safety guidelines that the person must use to handle and apply their product. In addition it should tell what to do if a person or animal is exposed to their product.

The label should include the name of the manufacturer and the contact information so consumers can call their customer service department with questions or concerns. If there is no label information that supplies all of these important details, it should be avoided.

Even some products that are organic in nature could be toxic if used in the improper levels or for the wrong application.   All of the information must be carefully reviewed and considered before making your choice.

Taking the time to research the products that are available, read labels, contact the manufacturer with questions or ask for guidance from a reliable garden center will help you choose the product that is both safe and effective.

Here are some Extension Fact Sheets that might be of help:

http://msuextension.org/publications/HomeHealthandFamily/4499.pdf

http://ipm.ucanr.edu/QT/gardenchemicalscard.html

http://www.healthline.com/health/fertilizers-and-household-plant-foods#overview1

Leafcutter Bees: Friend or Foe? by Joyce D'Agostino

Photo CSU Extension

Have you noticed curious semicircular cut outs in the leaves of some of your plants? This might mean that the busy Leafcutter bees are at work. Recently I noticed these cut out shapes on the leaves of some of my Alpine Strawberry plants. In researching more about them, I found that these bees are a beneficial insect, even though they may be doing some damage to your plants.

Leafcutter Bee Photo CSU Extension

 Leafcutter bees (Megachile spp.) are considered one of the important native insects here in the Western United States. They are solitary bees, meaning that they don’t live in a hives as do the social honeybees, but they are still very valued as a pollinator. When they make the cut and remove the leaf from your plant, it is not for a food source but used to build their nest cells. When they form their cell home, they then line each leaf cell with a mixture of nectar and pollen. The female bee lays an egg into the cell and seals it shut, which produces a secure environment for the eggs to develop.

Mosquitoes in the Home Garden by Carol King

Mosquito photo cdc.gov

While we have not had a lot of rain over the past several weeks, mosquitoes can still become a problem in the garden. The best time to manage mosquitoes is when they are in the larval stage. This stage, called wrigglers, lives in shallow water and feeds on microorganisms. They can be found in used tires, wheelbarrows, birdbaths, saucers under pots, ornamental pools and other places that hold standing water. Colorado Department of Public Health and Environment’s Fight the Bite website  recommends the following steps for reducing the mosquito population. 

Mosquitoes lay eggs in still water, which hatch in 7 to 10 days. If standing water is eliminated weekly around the property, many  mosquitoes will be kept from breeding in the first place. Here are some things you can do:

• Remove standing water in ponds, ditches, clogged rain gutters, flower pots, plant saucers, puddles, buckets, equipment and cans. Empty or flush out containers weekly to reduce or eliminate the larvae.
• Check for items that might hold water including wheelbarrows, leaky air conditioner hoses, pool covers, tarps, plastic garden sheeting, and trash.
• Change the water in birdbaths weekly.
• Use mosquitofish (mosquito-eating fish Gambusia can be released in ponds) or mosquito dunks to prevent mosquito larvae from growing in small areas of standing water.
• Avoid mosquitoes at dawn and dusk when the bugs are most active. 
• Wear socks, long-sleeved shirts and long pants while outdoors.
• Apply insect repellent with DEET. Follow directions carefully.

For more information about complete mosquito management, check these fact sheets:

http://extension.colostate.edu/mosquito-management/

http://www.ext.colostate.edu/ptlk/2029.html

http://www.fightthebitecolorado.com

Gardening Power to the People: Pollinators (Video)—Bee or Wasp?

Many people confuse bees and wasps. While they are both in the Hymenoptera order of insects they have unique characteristics. This short video will help you distinguish between the two.

Summer Rose Care by Donna Duffy

All around town the roses are finally in bloom! It's been a rough year for roses with an early fall freeze and a late spring freeze. Not all roses were able to survive the extreme weather. For those roses that made it, here are some tips to keep them healthy during the heat of summer. An excellent resource is “Growing Roses in Colorado” published by the Denver Rose Society.  There is a wealth of information on their website as well as a calendar of events.