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Observations by Gary Fewless for Green Bay WI (Lat.N 44.51° Long. W 88.02° ), except as noted. For flowers lacking conspicuous petals or sepals I define "anthesis" as release of pollen by mature anthers.

April 2012 Mouse-over the photo for the identity of the subject

April 29 The great white trillium (Trillium grandiflorum) is beginning it's peak flowering period.
April 28 Red baneberry (Actaea rubra) has begun to flower.
April 27 Starry false Solomon's-seal (Maianthemum stellatum) began to flower today.
April 26

I've had earlier reports from elsewhere, but this is the first day for open flowers of wild geranium (Geranium maculatum) on UWGB.

April 25 First day of flower for showy bush honeysuckle (Lonicera X bella) on my usual site at UW-Green Bay.
April 24

Today was the first day for new Canada Geese young-of-the year on our pond, Allouez, Brown County.

Pin cherry (Prunus pensylvanica) in flower, Forest County.

April 19 Last year on this date Green Bay received 10.1 inches of snow (9.9 plus 0.2 after midnight in early April 20).
April 17

First flower (anthesis) for early meadow rue (Thalictrum dioicum) on UWGB's Cofrin Arboretum.

Quaking aspen (Populus tremuloides) dispersed the first seeds of this year. That is 14 days earlier than the previous earliest date.

April 16

The weather was very interesting today. It was 69 degrees about 1 a.m. and the temperature fell throughout the day, eventually reaching 36 degrees before midnight. It was very windy and along the way we had periods of clouds, rain and patches of clear bright skys repeating, and about 80 miles north there was even vigorous though brief snow.

First day of flower for choke cherry (Prunus virginiana), Allouez, Brown County. Last year this same tree didn't flower until May 23--that's 37 days later.

I saw my first Red Admiral butterfly of the season today. I had received a report of a previous sighting during the last week.

April 15

Bishp's Cap (Mitella diphylla)Trout Lily (Erythronium americanum), prickly ash (Zanthoxylum americanum), early meadow rue (Thalictrum dioicum) and jack-in-the-pulpit (Arisaema triphyllum) flowering, Brown Creeper and Yellow-rumped Warbler, east side of Baird's Creek Parkway (Brian Pierce).

April 12 Barn Swallow and Ruby-crowned Kinglet back at Bay Beach Wildlife Sanctuary (Josh Martinez).
April 9 Red elderberry (Sambucus racemosa), inland juneberry (Amelanchier interior) and Ohio buckeye (Aesculus glabra--planted, anthesis) have begun to flower.
April 8

A flowering crab (Malus sp.) tree that I have monitored for 27 years has begun to flower--11 days earlier than the previous earliest date (which was in 2010).

A few plants of yellow rocket (Barbarea vulgaris) in flower around the City of Green Bay. I saw a couple of open flowers as early as March 26. This is a tough species to compare years for. It is a plant of recently disturbed sites and it is extremely numerous and widespread in our area, but it does not usually stay in the same sites for long, because it is out-competed when disturbance ceases, and then it appears in new sites as new construction etc. produces disturbed soil. Also it is likely that new seeds and therefore possibly new genes enter the area repeatedly with the transport of construction equipment and even just regular commerce.

April 7 The common alien species black medick (Medicago lupulina) and corn speedwell (Veronica arvensis) have begun to flower.
April 6

Door County apple orchards report that flowering is about 5 weeks ahead of normal. The recent frosts and freezes have required extreme measures to keep the flowers from freezing, including making clouds of smoke at night to keep it warmer.

Another Lilac (Syringa vulgaris) in flower, City of Green Bay (Vicki Medland)

April 5

Downy juneberry (Amelanchier arborea) in flower, courtyard MAC Hall UW-Green Bay.

Woodchuck out and about (saw one earlier March 16, Brown County, Town of Eaton).

Lilac (Syringa vulgaris) in flower, City of Green Bay (Josh Martinez).

April 4 One open flower of large white trillium (Trillium grandiflorum) and a few open flower of wood anemone (Anemone quinquefolia), City of Green Bay (Josh Martinez).
April 3

Purple spring-cress (Cardamine douglassii) in flower.

Striped maple (Acer pensylvanicum) in flower in my yard, City of Green Bay (Vicki Medland).

April 2

Spring beauty (Claytonia virginica) in flower. Also reported in flower by Vicki Medland, City of Green Bay.

An American Robin had four eggs in the nest on Sunday April 2 in my yard.  This is the earliest successful nest I have seen at my house, City of Green Bay (Gary Baier).

April 1

Cypress spurge (Euphorbia cyparissias) in flower.

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Last updated on May 20, 2015