#3 Wetlands Cattail growth is affected by many factors in the environment. Sunlight, temperature and soil nutrients are important. Water temperature and day length are other factors that also play a part. Estimate the height of the nearby cattails compared to the measuring pole in front of you and type your measurement in the box provided. Estimate to the nearest 1/10 of a meter. All fields marked with asterisk (*) are required. required text field How tall are the cattails?* Enter ONLY numbers like: .4 or 2.1 Link (required) Last modified on Jul. 21st, 2017 at 11:10am by .