The bulb onion is a master of hidden preparation. While we see the green leaves above ground, the real work is happening in the dark, beneath the soil. It builds itself layer by layer, protecting its tender heart with papery skin. It teaches us that God works in our hearts in layers, often in hidden ways, preparing us for a future purpose that we cannot yet see.
Sunlight: Full Sun (needs long days to bulb)
Soil: Loose, sandy, stone-free; fertile
Water: Consistent; needs moisture to expand the bulb
Day Length: Vital! "Long-day" for North, "Short-day" for South
Spacing: 4-6 inches apart for large bulbs
Nutrient Needs:
Week 1-3: Germination (slow); looks like a needle
Week 4-10: Growth of the green leaves (each leaf = one layer!)
Week 12-16: Bulbing stage triggered by day length
Maturity: The bulb pushes itself out of the soil
Sign of Harvest: The green tops "fall over" and turn brown
Curing: Dry in the sun for 2 weeks until skins are papery
Total: 100-120 days from seed; 80-90 from sets
The Protector: Onions produce sulfur compounds (that make you cry!) to protect themselves from being eaten. This same scent protects neighboring plants from pests.
Soil Indicator: Onions need loose soil. If they are small and stunted, the soil may be too compacted or hard.
Friends & Helpers: Carrots, Beets, Lettuce, Brassicas (broccoli/cabbage), Peppers.
Avoid planting near: Beans, Peas, Asparagus (Alliums interfere with their roots).
✓ Weeding: Onions are "poor competitors." Keep the bed perfectly weed-free.
✓ Don't bury: Onions like to sit ON the soil as they grow. Don't cover the bulb with dirt.
✓ Stop watering: Once the tops fall over, stop watering so the bulbs can dry and cure.
✓ Storage: Store in a cool, dark, dry place. A mesh bag or a braid works best.
Yellow: Best for cooking (strong flavor) | White: Traditional for Mexican food (sharp/crisp) | Red: Best for raw eating (sweet/mild) | Cultural: A foundational ingredient in nearly every savory dish (the "Holy Trinity" or "Mirepoix").
Different from Garlic: Garlic is planted in Fall; onions are usually Spring. Garlic has cloves; onions have layers.
Similar to Shallots: Shallots are smaller, grow in clusters, and have a more delicate flavor.
1 Samuel 16:7 — "The Lord looks at the heart"
"For the Lord sees not as man sees: man looks on the outward appearance, but the Lord looks on the heart."
An onion can have beautiful green leaves but a rotten heart, or small leaves and a magnificent bulb. It reminds us that God values the substance of our inner life over our outward show.
Ages 3–5: Count the layers of an onion skin. Are they thin like paper or thick like cloth?
Ages 6–9: Look at the onion in the garden. Is it hiding underground or showing its "shoulders" above the dirt?
Ages 10–13: Why do we let the onion dry in the sun (cure) after we pull it? (Hint: Think about what happens to water inside a closed bag).
Allium cepa (Onion family)
Seeds vs. Sets vs. Starts: Sets (bulbs) are easiest; Starts (plants) give the biggest onions.
Planting: Only bury 1 inch deep. Don't plant too deep or the bulb won't expand.
Watering: Needs 1 inch of water per week until bulbing starts.
Onions remind us that "The Heart Matters." We can't see the bulb growing, but every day it is adding layers of strength. In the same way, every prayer, every act of kindness, and every moment of obedience adds a "layer" to our soul, building a life that is substantial and useful for the Master's table.
Varieties to try: Walla Walla (sweet), Red Wethersfield (storage), Texas Early Grano (short-day), Patterson (long-day storage).