University of Maryland Extension

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Articles on Indoor and Seasonal Plants

Growing Dwarf Citrus Care of Amaryllis Indoor Rosemary Topiary Care Care of Phalaenopsis Orchids (moth orchid) Shamrock ( Oxalis ) Winter Houseplant Problems

Articles on Trees - Shrubs

American Holly Shines in Extreme Cold How do you Decide When to Remove a Tree? Rose is a Rose - 'Knock Out Roses' Why are Oak Trees Declining Why are Leyland Cypress Trees Turning Brown? What's Wrong with my Colorado Blue Spruce Tree?

Lichens

I’m Lichen It! - Winter Peak Season for Lichen Peeping Pictured above - Beard lichen on dogwood trunk, Caroline County MD The wet, gray days at the end of winter seem like they may never end. But this is actually the perfect time of year to get out and appreciate those mysterious ‘plants’...

How to Make a Meadow

Most Marylanders who invest their time and money in meadow planting experience disappointment and failure in the end. Two of the challenges specific to Marylanders are: bad meadow making instructions commercial shortage (absence, actually) of locally native seeds Until these problems are addressed...

Norway Maple

Back to Invasive Plant Photos and Information Norway Maple (Acer platanoides) Photo: Rob Routledge, Sault College, Bugwood.org About Norway Maple: An Invasive Plant in Maryland Life cycle/information: Norway maple (Acer platanoides) is a broadleaf deciduous tree that grows up to 50+ feet in height...

Giant Hogweed

Back to Invasive Plant Photos and Information Giant Hogweed (Heracleum mantegazzianum) Photo: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org About Giant Hogweed: An Invasive Plant in Maryland Life cycle/information: Giant hogweed (Heracleum mantegazzianum) is a herbaceous perennial...

Invasive Plant Photos and Information

Back to Weed Identification Photos Invasive plants out-compete and eliminate native species resulting in negative ecological changes. Grasses Invasive Grass Management Japanese stiltgrass Wavyleaf basketgrass Herbaceous Invasive Herbaceous Plant/Groundcover Management Canada thistle Garlic mustard...

Privet

Back to Invasive Plant Photos and Information Privet (Ligustrum obtusifolium) Photo: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org About Privet: An Invasive Plant in Maryland Life cycle/information: Border privet (Ligustrum obtusifolium) , is a perennial, woody, semi-deciduous shrub...

Winter Creeper Euonymus

Back to Invasive Plant Photos and Information Winter Creeper Euonymus (Euonymus fortunei) Photo: James H. Miller, USDA Forest Service, Bugwood.org About Winter Creeper Euonymus: An Invasive Plant in Maryland Life cycle/information: Winter creeper euonymus (Euonymus fortunei) , also called creeping...

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