Saturday, November 28, 2009

Landscape - Moisture Extremes and Tree Decline

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Wet years following drought years can cause problems with tree decline. The following is an article on the subject. Of great concern are moi...
Friday, November 27, 2009

Landscape and Turf - Don't Forget Soil Sampling Before the Ground Freezes

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The following is a reminder to take soil samples this fall if you have not yet done so. The 2009 growing season is wrapping up, and landscap...
Thursday, November 26, 2009

Greenhouse - Ethylene Damage to Poinsettias

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The following is information on ethylene damage to poinsettia plants. Ethylene Damage Ethylene (C2H4) is an odorless, colorless gas which ac...
Wednesday, November 25, 2009

Greenhouse - Poor Bract Color or Bract Fading in Poinsettia

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The following is information on poor bract color or bract fading in poinsettias. Poor bract color/Bract Fading Varieties, particularly those...
Tuesday, November 24, 2009

Greenhouse - Premature Cyathia Abscission in Poinsettia

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The following is information on premature cyathia abscission in poinsettias. Premature cyathia abscission The bracts are the conspicuous fea...
Monday, November 23, 2009

Landscape - Some Athyrium Ferns for Delaware

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The following are some Athyrium ferns recommended for used in Delaware Landscapes. All require part shade to full shade conditionas and mois...

Greenhouse - Latex Eruptions in Poinsettia

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The following is information on latex eruptions on poinsettias. Latex Eruptions This disorder, once referred to as crud does not seem to be ...
Sunday, November 22, 2009

Landscape and Nursery - Some Sedge Species for Delaware

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The following are some sedge species to consider for Delaware. Carex dolichostachya 'Kaga-nishiki', gold fountain sedge Description...
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Greenhouse - Bract Edge Burn on Poinsettia

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The following is information on bract edge burn on poinsettias. Bract necrosis/Bract Edge Burn This disorder, which can be recognized by bro...
Saturday, November 21, 2009

Landscape - Assessing Potential for Winter Storm Damage to Trees

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With fall progressing, it brings to mind concerns about potential storm damage to trees. Vicious winds and ice storms, or heavy wet snow, ha...

Greenhouse - "Rabbit Tracks" on Poinsettia

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The following is information on the "rabbit track" disorder of poinsettia bracts. Bilateral bract spots (Rabbit Tracks) Many reaso...
Friday, November 20, 2009

Greenhouse - Poinsettia Wilting

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The following are some causes for wilting in poinsettias Wilting/Epinasty in Poinsettia The most common cause of wilting is a lack of water,...
Wednesday, November 18, 2009

Greenhouse - Cold Weather and Poinsettias

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The following are some cold temperature effects on poinsettias. Cool temperatures can delay initiation and development of flower parts. The ...
Tuesday, November 17, 2009

Greenhouse - Poinsettia Bract Splitting

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The following is information on the bract splitting disorder of poinsettias. Bract Splitting The splitting disorder was first encountered wi...
Monday, November 16, 2009

Greenhouse - Poinsettia Leaf Distortion

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Leaf disortion is a common problem on poinsettias. The following is more information. Leaf distortion This disorder most often occurs in the...
Sunday, November 15, 2009

Greenhouse - Cloudy Weather and Calcium on Poinsettias

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The rainy weather for the last couple of weeks is making it tough for poinsettias to pull up calcium this fall. If you don’t get adequate up...
Saturday, November 14, 2009

Greenhouse - Pythium on Poinsettias

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Pythium is a common root infection in poinsettias. The following is more information on this disease from the University of Maryland. Pythiu...

Greenhouse - Pictures of Pythium on Poinsettias

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The following are pictures of Pythium, a common root rot organism on Poinsettias. Darkened roots of Poinsettia cause by Pythium. Poinsettia ...
Thursday, November 12, 2009

Greenhouse - Weak Side Stems and Stem Breakage in Poinsettia

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There are several possible reasons for the development of side stems which are so weak and thin that the inflorescences cannot be kept erect...
Wednesday, November 11, 2009

Greenhouse - Fascination Growth Regulator on Poinsettia

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The following are conclusions from research at Michigan State University on using Fascination growth regulator to increase height and bract ...
Monday, November 9, 2009

Landscape - Winterberry Holly

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Winterberry holly is a great landscape plant for Delaware and adds significant winter interest with persistant berries. The following is mo...

Landscape - New Abelia Cultivars

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The following are some new Abelia cultivars from the University of Georgia breeding program that would do well in Delaware Landscapes Abelia...
Sunday, November 8, 2009

Landscape - Problems with Leyland Cypress

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Leyland Cypress is a popular, fast growing hedge or border tree reaching heights of 50 to 100 feet and widths of 20 to 30 feet. Though Leyla...

Landscape - Seiridium Canker on Leyland Cypress

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The following are pictures of Seiridium canker on Leyland Cypress, one of the common causes for losses of this tree in Delaware. Seiridium c...
Saturday, November 7, 2009

Landscape - Issues With Late Planted Evergreens

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Many homeowners are interested in buying live christmas trees to be planted out after Christmas and landscapers may want to do late fall pla...

Landscape - Winter Leaf Burn

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With winter fast approaching, landscape plants can be exposed to winter injury. One such injury is foliage "burn". The following...
Friday, November 6, 2009

Landscape - Mulching Basics

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The following is information on mulching for landscapers to consider. After planting, mulch immediately with organic materials that slowly r...

Landscape - Planting Basics

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The following are some planting basics for landscapers to consider. Proper planting is the key to healthy plants that can resist drought, in...
Wednesday, November 4, 2009

Landscape - Tree Protection Zones During Construction

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The following is good information on setting up tree protection zones during construction activities to preserve desired trees. Before const...

Landscape - Tree Protection Zone

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The following is a picture of a well defined tree protection zone. Photo from "Tree Protection During Construction and Landscaping Acti...