The growth will be elongated and abnormal. Plants vary in the intensity of light they need. Some plants such as Impatiens grow better in the shade with indirect light while others such as zinnias grow best in full sunlight. Photoperiodism is the growth response to the length of dark period. This effects whether a plant is growing vegetatively or is in the flowering stage.
Dandelion is a day plant and can initiate flowers under any day length.
This involves covering the growing plant with an opaque cover to exclude light. This simulates long days by adding light in the evening hours. Phototropism Demonstration Place a bean plant under a box with one side cut out. Check the bean plant the next day to see which direction it is leaning. Turn the box 180 degrees and have students observe what happens to the direction the plant leans after two more days.