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Effects of soil and water on growth of jewelweed

Hanna Wood, Maddy Burds, and Izzy Murphy


Impatiens pallida, yellow jewelweed or pale touch-me-not, is an annual plant that grows in patches along the Creekside Trail in the DePauw Nature Park.  We investigated the effects of sunlight and soil water content on growth of jewelweed plants in patches along the trail.  


We hypothesized that yellow jewelweed plants would be larger in areas with more sunlight and more water.  


We sampled a total of 100 plants in 10 patches along the trail.  We measured soil water content, number of leaves per plant, and canopy cover.  


We found no differences in soil water content among the patches.  The median number of leaves and flowers was significantly different among patches.  Plants in patches 1 and 2 had significantly more leaves than plants in the other patches.  We found significant correlations between number of flowers and number of leaves.  There were no significant correlations between canopy cover, soil water content, number of flowers, or number of leaves.