That is an excellent question and one that
scientists, farmers, and people who love growing
plants in their gardens have been considering
for hundreds of years! The answer to your
question depends on a lot of things and perhaps
most importantly, the time of the year when
plants are growing. For example, in much of the
world, it snows during the winter and plants
grow much faster when they are inside and
provided with some fertilizer. Outdoor plants in
snowy places often die back and survive as
underground bulbs. This is something that onions
and tulips do in the winter. In places like
Santa Barbara, where it doesn't snow (at least
not very often!), it's still really cold outside
in the winter. So plants may grow better inside,
where warm conditions make it easier for their
cells to reproduce quickly. Plus, young plants
may die if their leaves, stems, or roots freeze
during the winter outdoors.
During the spring, it may not matter as much
whether a plant is inside or outside, as long as
it has access to enough light, water, and
nutrients to grow.
I'm glad that you are interested in plants
and hope that this answered your question!
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