Science Project Ideas
BOTANY (Plants) 

Remember that these project ideas and outlines are meant to help you complete your own science project. But it is DISHONEST and UNETHICAL to copy someone else's project work samples and submit them as if they were your own. That's called plagiarism and it's a fast way to get a failing grade. It's okay to do the same project as someone else, or review what others have done so you can make your project better, but DO NOT COPY and pretend it's your project. Someone is sure to spot the plagiarism!!  


  1. What are the effects of gravity on seed sprouting?

  2. Does electric or magnetic fields affect seed sprouting or plant growth?

  3. What are the effects of low frequency EMF on plants?

  4. Does light affect seed germination? How does this relate to planting depth for a given type of seed?

  5. What are the effects of ultraviolet radiation on seed germination?

  6. Would microwaves have an effect on seed germination?

  7. Do X-rays have any effect on seed germination?  

  8. Does temperature affect how well seeds sprout?

  9. Do high temperatures affect the germination of pine seeds?

  10. Will soaking in water before planting help seeds sprout?

  11. Does the type of water source used affect seed germination?

  12. Does the amount of available moisture affect seed germination? (Test normal, too little and too much)

  13. What are the effects of soaking seeds in various chemical substances? (sugar or salt water, acids, bases, etc.)

  14. Does salt or sugar affect seed germination?

  15. How fast do roots grow?

  16. Does seed size affect germination rates?

  17. What effect would freezing have on how well seeds sprout?

  18. Does tobacco or alcohol affect germination rates?

  19. Does moisture pH affect sprouting of grass seeds?

  20. Does soil acidity affect how well seeds sprout?

  21. What is the effect of acid rain on seed germination?

  22. What is the effect of smoke on black pine seed germination?

  23. Does gold dust have any affect on the germination of radish seeds?

  24. Does the depth a seed is planted affect its ability to sprout?

  25. Which antioxidant substance is best for radish seed germination?

  26. What are the effects of potassium, calcium ,and vitamin C on the growth of radish seeds?


  27. Does soil quality vary from one county to another?

  28. What kind of soil is best for plant growth?

  29. Is plant growth affected by how closely together the seeds where planted?

  30. Is there a correct amount of water to use for good plant growth?

  31. Does the respiration rate indicate the rate of plant growth?

  32. Do plants grow better with tap water or distilled water?

  33. Examine phototropism, the study of why plants grow towards light.

  34. What is the effect of different colors of light on plant growth?

  35. Is plant growth affected by exposure to ultraviolet light?  

  36. How much light do plants need to survive? Does the amount vary by plant?

  37. How do plants use photosynthesis to make food?
    Does photosythesis take place in the absence of light?

  38. Does light intensity affect the rate of photosynthesis?

  39. What is the effect of temperature on the rate of photosynthesis?

  40. Does CO2 concentration affect the rate of photosynthesis?

  41. Is the amount and rate of plant photosynthesis variable?

  42. Which type of vegetable has the highest concentration of chlorophyll?

  43. Is there a relationship between a leaf's starch and chlorophyll?
    Can you paint images on plant leaves using light?

  44. What effect does electricity have on plants?

  45. What effect does temperature have on the growth of plants?

  46. Does proximity to high voltage lines affect the growth of plants?

  47. What is the effect of common beverages on plant growth?

  48. What is the effect of MSG, sodium and glutamate on plant growth?

  49. Is leaf size related to the amount of light received by a plant?

  50. Do hydroponic plants grow taller than plants raised in soil? 

  51. What is the effect of hydroponics on root development?

  52. What changes in plant shape and growth occur when plants are overcrowded?

  53. Can plants grow from leaves that are cut off and planted?

  54. What is the effect of artificial plant hormones on the growth of plant cuttings?

  55. What is the effect of gibberellic acid on plant growth/flowering/fruiting?

  56. Cytokin or Gibberellin: Which increases potato plant growth more?

  57. What effect does different types of music have on plant growth?

  58. How would leaf harvesting affect a plant's health at different growth stages?

  59. Do earthworms affect plant growth?

  60. Do spices have any effect on the growth of non-spice plants?

  61. What are the best conditions under which to grow garlic?

  62. What factors affect root growth?

    SOIL pH

  63. Does soil pH affect the growth of strawberries? 

  64. What are the effects of temperature and pH on elodea plants?

  65. Does a given type of plant prefer a soil that has a certain pH?

  66. Compare the pH of soil samples from various locations in your area.

  67. How can the soil pH be changed so it is better for plants?

  68. Determine if the growth of certain types of vegetables changes the acidity or other types of soil chemistry.


  69. What is the effect of different nitrogen concentrations on plant growth?

  70. Which brand of chemical fertilizer produces the greatest growth?

  71. Which is best... organic or inorganic fertilizers?

  72. Which is the best medium for new cuttings - plain water, water with synthetic auxin added or water with fertilizer added?

  73. Is food waste (tea bags, coffee grounds, orange rinds, banana peels, etc.) a good fertilizer for plants or does it harm their growth?

  74. Would it help plant growth to add vitamins (A, E, C) to the soil?


  75. What effect does salt water have on plant growth?

  76. How effective is lettuce as a bioassay medium for determining the toxicity of saline solutions?

  77. What are the effects of different salts on a cauliflower plant?

  78. Would soapy water harm or help seed sprouting and/or plant growth.

  79. What effect does bleach have on the growth of plants?

  80. What effect does cigarette smoke have on plant transpiration?

  81. Does nicotine affect plant growth?
    How does cigarette smoke affect plant growth?

  82. Does caffeine affect plant growth?

  83. Does the use of insecticides affect the growth of vegetables?

  84. What is the effect of Tobacco Mosaic Virus on common vegetables?

  85. What effect does ozone have on plant growth?

  86. What happens to vegetables that are subjected to acid rain?
    What effect does acid rain have on flowers?
    Will antacids reverse the ill effects that acid rain has on plants?

  87. See our Environmental Science category for further "contaminants" projects.


  88. Will fruit extract help bean cutlings re-grow root cells?

  89. Compare different types of soil in their ability to absorb and retain water.

  90. Where are there more stomata, the top or bottom of a leaf?

  91. How does moisture move through plants and how quickly does it move?

  92. Which type of plants have the greatest transpiration rates?

  93. Which type of tree has the greatest transpiration rates? (compare 2 or more)

  94. What factors affect how plants reproduce? 

  95. Can plants survive without soil? If so, how?

  96. Why do carnivorous fly trap plants close to trap insects but do not close when rain drops or debris falls in?

  97. What is the best environment in which to grow mushrooms?

  98. What are the steps in the lifecycle of a mushroom?

  99. What environment is needed for moss to grow and flourish?

  100. Why do leaves change color in the fall? 

  101. Examination of tree growth rings and their relation to past weather patterns.

  102. What are the different methods of plant pollination?

  103. Examine Genetic Engineering and its effect on the agricultural arena.

  104. Are some plants allopathic; able to kill or retard the growth of nearby plants?

  105. Which herbicide is the best weed killer?

  106. Is there a relationship between seed shape and the method of seed dispersal?

  107. Which additive is the best for preserving cut flowers (salt, aspirin, etc.)?

  108. Examine whether or not the shape/angle of the stalk cut has any effect on the life of cut flowers.

  109. Which type of grass is the most drought resistant?

  110. Examine grafting methods and determine which plants it can be used with.

  111. How do some plants manage to climb walls or fences?

  112. Which vegetables have the highest percentages of water content?

  113. Is it possible to clone carrots or other vegetables?

  114. Which vegetables contain the most simple sugars?

  115. Why is ethylene gas important in the fresh fruit and vegetable industries?

  116. Which avocado rots fastest, one cut from the tree or one with a broken stem?

For further information on these ideas see