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Learn Botany

Learn how plants grow, feed themselves and reproduce, and how to name them.

Free to start. Built from a single prompt. No credit card.

Botany is the scientific study of plants: how they are built, how they make food from light, how they move water from roots to leaves, how they reproduce and how they are classified. Plants have their own toolkit, including cell walls, chloroplasts, growth from meristems and a life cycle that alternates between generations. The subject is unusually hands-on, since a garden, a park or a houseplant gives you specimens every day. Learnr builds a personalized botany course from a single prompt and teaches it through short, interactive lessons.

How to learn Botany, step by step

Start with what makes plant cells different. Learn the cellulose cell wall, chloroplasts and the large central vacuole that keeps cells firm. Look at an onion skin or a leaf from a pond plant like elodea under a microscope to see walls and moving chloroplasts.
Learn the plant body and its tissues. Study dermal, ground and vascular tissue, then how roots, stems and leaves are built. Learn the meristems that let plants keep growing at their tips, and compare monocot and dicot stems, leaves and seeds.
Understand photosynthesis in two stages. The light reactions split water, release oxygen and make ATP and NADPH; the Calvin cycle uses them to fix carbon dioxide into sugar. Then compare C3, C4 and CAM plants, like corn and cacti, as adaptations to heat and drought.
Follow water and sugar through the plant. Learn how transpiration from leaves pulls water up the xylem by cohesion and tension, and how stomata balance water loss against carbon dioxide intake. Then see how phloem carries sugars from sources to sinks.
Dissect flowers and study life cycles. Pull apart a simple flower to find sepals, petals, stamens and pistil. Learn alternation of generations across mosses, ferns, conifers and flowering plants, and the double fertilization unique to flowering plants.
Identify plants in the field. Use a regional field guide and dichotomous keys, starting with leaf arrangement, leaf shape and flower parts, then learn a few large families like the mints, roses and daisies. Never eat a wild plant based on your own identification, and review with short Learnr lessons.

What you'll learn

Describe plant cells and the tissues of roots, stems and leaves
Explain photosynthesis, including the light reactions and the Calvin cycle
Explain how water and sugars move through xylem and phloem
Describe flowers, pollination, fertilization and seed development
Identify common plant families using a dichotomous key

What's inside your Botany course

A sample path Learnr builds for Botany. Your real course adapts to your goal and level.

1. Plant cells and tissues
2. Roots, stems and leaves
3. Photosynthesis and plant metabolism
4. Water and nutrient transport
5. Reproduction and plant life cycles
6. Plant diversity, classification and identification

How long does it take to learn Botany?

An introductory botany course takes about 2 to 3 months at 3 to 4 hours a week. Plant identification is a separate skill that grows season by season, and knowing the flora of your region well can take a few years of regular outings.

What you need before you start

Basic biology helps, especially the cell and photosynthesis. No equipment is needed to start, though a hand lens and a regional field guide make observation much richer.

Common mistakes to avoid

Thinking plants get their mass from soil. Most of a plant's dry mass comes from carbon dioxide fixed during photosynthesis, plus water.
Identifying plants from one feature like flower color. Use several traits together, such as leaf arrangement, leaf shape, stem and flower structure.
Eating or handling wild plants based on an uncertain identification. Some edible plants have toxic look-alikes, so consult experts before foraging.

How Learnr builds your course

Type your topic

Tell Learnr you want to learn Botany, or get as specific as you like.

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Learnr instantly builds a full Botany course tailored to your goal and skill level.

Learn and level up

Move through bite-sized lessons and interactive practice, earning XP and keeping your streak.

Botany questions, answered

Is botany the same as gardening?

No, though they overlap. Gardening is the practical skill of growing plants, while botany is the science of how plants work, evolve and are classified. Botany makes you a better gardener.

How do I start identifying plants?

Learn the basic terms for leaf arrangement, leaf shape and flower parts, get a field guide for your region, and practice on common local plants before moving to harder groups like grasses.

Are fungi part of botany?

Historically fungi were studied in botany departments, but they are not plants and are more closely related to animals. Today they belong to mycology, which is often taught alongside botany.