Side by side
Pick two or three seeds to see how they grow, side by side: sprouting, spacing, sun, water, frost and pet safety in one table.
Comparing Alfalfa vs. Peanut vs. Avocado
The comparison
| Fact | | | |
|---|---|---|---|
| Difficulty | Moderate | Moderate | Moderate |
| Life cycle | Perennial | Annual | Not yet verified |
| Germination time | Not yet verified | 10–15 days | Not yet verified |
| Germination temperature | Not yet verified | 20–35 °C68–95 °F | 20–25 °C68–77 °F |
| Sowing depth | 6 mm–1.5 cm¼–½ in | 5–8 cm2–3¼ in | Not yet verified |
| Spacing between plants | Not yet verified | 15–23 cm6–9 in | Not yet verified |
| Days to maturity | Not yet verified | 120–150 days from sowing | Not yet verified |
| Sun | Full sun, partial shade | Full sun | Full sun, partial shade |
| Water | Not yet verified | Not yet verified | Moderate |
| Containers | Not yet verified | Yes | Yes |
| Frost tolerance | Hardy | Tender (no frost) | Not yet verified |
| Soil pH | Not yet verified | pH 5.8–6.2 | Not yet verified |
| Links |
Up close
What each one is, in a few lines, with the full growing guide one click away.
Fruits & otherMedicago sativa
Alfalfa, also called lucerne, is a perennial legume grown from seed in full sun or partial shade. Sow it shallowly, inoculate the seed before planting, and expect it to fix much of its own nitrogen.
How to grow alfalfaFruits & otherArachis hypogaea
Peanuts are warm-season annuals grown from seed for their underground pods. They need full sun and a long, warm season, often 120 days or more to ripen.
How to grow peanutFruits & otherPersea americana
Avocado is a tropical evergreen tree from Central America. Seeds sprout easily in water and make attractive houseplants, but a plant grown from seed won't produce fruit.
How to grow avocadoKeep comparing
Add a third seed, or swap one for a close relative from the same category.
Alfalfa vs. American PersimmonAlfalfa against another seedPeanut vs. American PersimmonPeanut against another seedAvocado vs. American PersimmonAvocado against another seed
Alfalfa vs. Apple TreeAlfalfa against another seedPeanut vs. Apple TreePeanut against another seedAvocado vs. Apple TreeAvocado against another seedThe table, row by row
Every row is a fact from each seed's own profile, lined up so the differences stand out.
Germination time and temperature
How many days the seeds take to sprout, and the temperature range they sprout in.
Sowing depth and spacing
How deep to sow each seed and how far apart the plants should grow. “On the surface” means the seed isn't covered.
Days to maturity and life cycle
How long until the plant is ready, counted from sowing or from transplanting (each value says which). Annuals live one year, biennials two, perennials longer.
Sun and water
Full sun means 6 or more hours of direct sun a day, partial shade a few hours. Water needs are rated low, moderate or high.
Containers, frost tolerance and soil pH
Whether it grows in a pot, with the smallest pot when it's known. Frost tolerance runs from tender (no frost) to hardy. Soil pH 7 is neutral.
Toxicity to cats and dogs
Whether the plant is toxic to cats and dogs.
Quick wins
Days from sowing until the first shoots appear, in good conditions.
Pet friendly
Listed as non-toxic to both cats and dogs. Each seed's page has the details.
Not safe for pets: borage, buckwheat, caraway, carnation and 14 more.
Comparing
Each seed's page explains how to grow it from seed, with facts researched and reviewed by our editors.
