Nursery and Flower Grower

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A root tip showing the microscopic zones of where cells divide, elongate and form specialized cells such as root hairs.
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Take a closer look at roots

June 19th, 2019
By Steven A Tjosvold
Roots are often overlooked by horticulturists but deserve to get more attention. Of course, they are usually underground and out of sight so it's somewhat understandable why they can be ignored. But, roots play a critical role in the life of a plant.
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It Grows Like a Weed
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Weeds and Seeds

May 29th, 2019
By Steven A Tjosvold
The last post demonstrated the remarkable ability and unique features of aphids that allow them to rapidly boost their numbers and colonize their hosts in favorable conditions.
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Fig 1. Rose petals with early Botrytis symptoms. Note necrotic spots with dark halos.
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It's Spring and Botrytis Is in the Air

April 17th, 2019
By Steven A Tjosvold
Gray mold caused by the fungus Botrytis cinerea is one of the more destructive plant pathogens, and it attacks a wide variety of plants. It is a common springtime disease, favored by cool rainy periods and high humidity. Conditions just like we have seen in California recently.
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Fig 1. Soil physical properties of selected container media
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Soil Mixes Part 9: Properties of Common Soil Mix Components

April 3rd, 2019
By Steven A Tjosvold
The previous blog demonstrated that container organic and inorganic physical components have limited nutrient holding capacity, and therefore the soil mixes they compose must be supplemented with nutrients during crop growth.
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