Black-Eyed Susan

1-Rudbeckia hirta

Black-eyed Susan

2-Estimated population: 205 per acre

Dispersal Pattern: 1/20?


  • Is native biennial
  • Can grow over 3 feet tall
  • Can grow in meadows, roadsides
  • Yellow, large, wildflower

4-Our plant's mircoclimate was composed of other grasses and generally rocky soil.

5-We found that the plant liked moist soil and undisturbed areas, and other things we based on our observations.

6-We said if the soil is disturbed and left alone then the black eyed Susan's can grow again.

7-We checked to see where and when the last construction was going on around our plants.

8-Results were largely inconclusive. There was no particular set of soil conditions that encouraged the growth of the plant.

9-Problems that could have led to inconclusive results include: testing surface-level soil that was not at root-level, not gathering enough trials, and not having a consistent and accurate way of testing for soil moisture.

To solve these problems in future studies, we should: collect soil samples from deeper inside the ground, gathering soil from more trials, figuring out a way to measure the exact moisture content in soil.

Comment Stream

3 years ago

Abigail Day, Mykayla O'Reilly, Ying Chow, Abigail Daugherty

3 years ago

For dispersal, identify the pattern as random, clumped/aggregated or uniform.

3 years ago

Your problem is a tad too general to be studied. If you think Rudbeckia out-performs other species in a disturbed area, how might you test that hypothesis? It would be great if you could find out!

3 years ago

For microclimate, you want to include sun exposure as well.