### Growth of plant CONSTANT VARIABLES: soil, grass seeds, pots, water

```Fertilizer on a
Mission
Question
• Do seeds grow better in liquid, solid, or
powdered fertilizer?
purpose
• The purpose of our investigation is to determine if
grass seeds grow better with liquid, solid, or
powdered fertilizer? This is important because when
you use fertilizer, you should use the one that grows
seeds the fastest.
Hypothesis
• I hypothesize that the powdered fertilizer would
help seeds grow the best. I believe this because
the powdered fertilizer will be absorbed more
quickly by the seeds. Liquid would be too runny
and would make the seed drown. The solid
would be too hard and the seed would not be
able to come out of the solid fertilizer because
the solid would be covering the seed.
PROCEDURE
Materials
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Three sets of 5 seed starting plant pots
Solid fertilizer – Miracle Gro Plant Food Spikes
Liquid fertilizer – Schultz Plant Food Plus
Powdered fertilizer – Miracle Gro All Purpose Plant Food
1 TBSP measuring spoon
Bermuda Grass Seed – 30 tsp.
Water
Variables
MANIPULATED VARIABLE: Type of fertilizer
RESPONDED VARIABLE: Growth of plant
CONSTANT VARIABLES: soil, grass seeds, pots,
water
DIRECTIONS
Gather materials
Fill 3 sets of 5 cups of seed growing plant pots
Label pots with the names of the fertilizer that was used on the seeds
Place ¼ tsp grass seed in each pot
Using directions on package, mix liquid fertilizer with water
Using directions on package, mix powder fertilizer with water
Place 1 solid plant stick into pot and label
Water daily, using 1 tbsp. in each cup of all three sets of plants
Monitor the pots daily for growth measure the height of the grass in
each pot. Record.
• Calculate the average growth for all solid, liquid, powdered fertilizer
plants!
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Plant Growth Chart
Type of
Fertilizer
TRIAL ONE
TRIAL
TWO
TRIAL
THREE
TRIAL
FOUR
TRIAL
FIVE
AVERAGE
Liquid
Tallest:
2.0cm
Tallest:
1.6cm
Tallest:
1.9cm
Tallest:
1.7cm
Tallest:
2.3cm
Tallest:
1.9cm
Blades: 15
Blades:8
Blades:9
Blades:12
Blades:7
Blades:8
Tallest:
1.8cm
Tallest:
1.4cm
Tallest:
1.3cm
Tallest:
1.7cm
Tallest:
1.3cm
Tallest:
1.5cm
Blades:2
Blades:3
Blades:6
Blades:2
Blades:3
Blades:3.2
Tallest:
0.0cm
Tallest:
0.0cm
Tallest:
0.0cm
Tallest:
0.0cm
Tallest:
1.0cm
Tallest:
0.2cm
Blades:0
Blades:0
Blades:0
Blades:0
Blades:1
Blades:0.2
Powder
Solid
KEY:
= LIQUID
= POWDER
= SOLID
Conclusion
• My hypothesis was incorrect, seeds grow better with liquid
fertilizer. The liquid fertilizer average was 1.9 cm and
produced 8 blades of grass. The powdered fertilizer
average was 1.5cm and produced 3.2 blades of grass. The
solid fertilizer average was 0.2 cm and produced 0.2
blades of grass. If I could do this project again what I
would do differently is, I would use a different plant, or
grass type to see if I got the same results.
```