nitrogen and phosphorous
To make plant grow faster
photosynthesis...your plant needs light to grow. or if u want to to grow good use miracle grow..
yes all plant need light to grow
potato
yes
Different species of plant need different soil types to grow and thrive.
The new plant if cross pollinated need to have its pollinators at that place for its success to grow and multiply.
No the plant would need water and sunlight.
Photosynthesis
You need to state what place before I can answer you.
They grow on plants. (Like tomatoes). You need to plant the seeds in the soil. Then the plant grows and watermelon is it's fruit.
becasue without it plants cant grow to be healthy