Biology: Purple deadnettle (Lamium purpureum) is a common winter annual broadleaf weed found throughout the US. It is closely related to another winter annual broadleaf, henbit (Lamium amplexicaule). Both have vibrant purple flowers that can been seen now in lawns, landscapes, and fields. To see more about henbit, refer to this article from last spring: https://www.purduelandscapereport.org/article/spotlight-on-weeds-henbit-lamium-amplexicaule/ Identification: Purple deadnettle is a winter annual meaning that it germinates in the fall, survives the winter as a small seedling, until spring when it flowers, develops seeds, and then dies when temperatures rise in late spring and early summer. Purple deadnettle blooms are mainly visible in April although you can find it blooming earlier and later depending on the area it is growing and the temperatures. Purple deadnettle is a member of the mint family and has a characteristic square stem. Purple deadnettle flowers are light purple in color and are small and tubular in[Read More…]
A question that I often receive goes something like…. ‘How do I control grassy weeds in liriope and iris?’ At first glance, it would appear that those ornamental plants are very similar to grasses, but looks may be deceiving as they are actually not grasses. We know that broadleaf weeds can be controlled in grasses via broadleaf specific herbicides (Fig. 1), as well as grassy weeds can be controlled in broadleaf plants fairly easy with grass specific herbicides (Fig. 1 and Fig. 2). What is often misunderstood is the control of grassy weeds in grass-like ornamental plants. Broadleaf and grass weeds metabolize some herbicides differently. These differences allow herbicides to be selective in nature. True grasses are in the Poaceae family. Grass-like ornamental plants, such as liriope and iris are not in the Poaceae family, so the selectivity of grass-specific herbicides will not damage these plants. Grass-specific herbicides (called graminicides)[Read More…]
A new publication for nursery growers has been released! This publication, a joint venture between Purdue University and Indiana Department of Natural Resources, informs that nursery and landscape industry about new state regulations regarding invasive plants. The rule goes into effect in two stages. As of April 18, 2019, it is illegal to introduce a plant species (from the list of 44) if it is not already in Indiana. Listed plant species already in trade will be restricted from sale one year later (April 2020). The one-year grace period is designed to reduce the economic impact on the nursery industry by allowing time to sell down existing stock and adjust production.
We all know that plants take up nitrogen in significant quantities, compared to some of the other essential nutrients. What most don’t know is that elemental nitrogen (N) is not what is taken up by plants. In fact, nitrogen can be taken up in only two forms, ammonium (NH4) and nitrate (NO3). Fertilizer labels will list the elements contained within, including the various types of nitrogen (Fig.1). What you should know about pH….. The definition of pH is the negative logarithmic of the hydrogen-ion concentration. What does this even mean? More simply put, the more H+ (hydrogen) ions, the more acidic, while the more OH– (hydroxide) the more basic. Always remember that the pH scale is logarithmic, which means each number on the scale is 10 times more acidic or basic than the next number on the scale. A pH of 6 is 10 times more acidic than a pH[Read More…]
The Invasive Terrestrial Plant Rule was signed by Governor Holcomb and published on March 18, 2019. The rule goes into effect 30 days after publishing, so it will be effective later in April. The rule states with respect to the 44 plant species included on the rule: “a person must not: (1) Sell, offer or grow for sale, gift, barter, exchange, or distribute a species; (2) Transport or transfer a species; or (3) Introduce a species. (4) Subdivisions (1) and (2) of this subsection are effective one year after the effective date of this rule.” Note that section (3) “Introduce a species” is effective immediately (around April 16, 2019). Selling, offering, distributing and transport doesn’t go into effect until April of 2020, so nurseries will have some time to sell down their stock. This is an important component of the rule to minimize economic loss to nurseries that grow and/or[Read More…]
The Professional Landscape Management School is held annually in Evansville, IN. The two day conference for Green Industry professionals focuses on current, research-based best management practices. Leading experts and specialists will be speaking on various topics, such as insect and pest management, plant health care, weed control, and more. Continuing educational credits will be requested for pesticide applicators, arborist, and IAH license holders in Indiana and surrounding states. Click here for the brochure: Professional Landscape Management School For details and registration, click here: http://www.cvent.com/d/fbqnk2 If you have questions about the Professional Landscape Management School, please contact Lori Jolly-Brown 765-494-1296 or email@example.com.
The 2019 Indiana Arborist Association Annual Conference will be held in Indianapolis at the Indianapolis Marriott East, January 22-24th, 2019. The IAA and our partners will be offering a full 3-day program with educational opportunities and trade show for anyone involved in planning, planting or managing trees in the built environment. The conference proceedings will begin on Tuesday morning with a full day focused on urban forestry issues and current trends. Important topics such as the influence of climate change on tree selection, and creating high-performance trees. We are excited to hear the results of a 10-year student on the impacts of construction on trees from Dr. Richard Hauer from the University of Wisconsin and how storms over the urban forest are having an impact on the trees in our cities and towns. Community planning for local governments regarding managing natural resources to their full potential will be provided by Kara Salazar[Read More…]
This short course has been cancelled for these dates. We’re working on a new set of dates to offer this program, so keep checking back with www.PurdueLandscapeReport.org for updated information. The Controlled Environment Agriculture (CEA) Short Course is an immersive, condensed, intensive entry-level educational experience for personnel in the Controlled Environment industry, as well as those with CEA experience seeking best management practices in the areas of business and horticulture will also find the CEA Short Course useful. The Short Course covers several production systems and associated crops common in CEA production, including greenhouse production systems, vertical farming, hydroponics, aquaponics, high tunnels, and more! Business plans and marketing are also discussed in this program, offering advice on how to help your organization get ahead in a crowded marketplace. Attending this course will allow a two week experience that includes time on campus and attending the Indiana Horticultural Congress, learning from specialists and researchers from several disciplines. The first week will[Read More…]
This short course has been cancelled for these dates. We’re working on a new set of dates to offer this program, so keep checking back with www.PurdueLandscapeReport.org for updated information. The Landscape Management Short Course is an immersive, condensed, intensive entry-level educational experience for personnel in the Green industry, as well as those with experience seeking best management practices in the areas of business and landscape management that is hosted by Purdue University Extension. The dates for the short course are February 18-22 and February 25-March 1. Attending this course will allow a two week experience on Purdue’s campus, learning from specialists and researchers from several disciplines. The course will explore the following topics designed for specifically for the landscape industry: Diagnostic Training Planting Pruning Plant Selection Weed Control Hardscape (paver) Installation Marketing Learning Objectives: After completing this course the attendees will be able to: Define the scope[Read More…]
The Indiana Green Expo is Indiana’s largest and most comprehensive Green Industry educational conference and trade show serving Indiana and the Midwest. The 2019 Indiana Green Expo (IGE) is sponsored by the Indiana Nursery & Landscape Association and the Midwest Regional Turf Foundation. Unlike some for-profit trade shows, all proceeds from the IGE are used directly to better our industry through research, educational programming and other supporting functions. Since the IGE is managed by green industry professionals for Green Industry professionals, you’ll find targeted, industry-specific products, information, education and networking that you can use immediately in your profession. This year Purdue University and industry have worked together to bring you the best line up yet! Our educational programming has something for all facets of the Green Industry. The trade show features vendors with new products and show specials to make it worth your while. Take your time to visit as[Read More…]