Onion Grow Kit | Seeds In A Cup®

Why Growers Trust Seeds In A Cup®

• 100% recyclable eco-friendly packaging
• Hand-assembled in Cleveland, Ohio, USA
• High-germination non-GMO batch-tested seeds
• All-in-one kit: seeds, real soil, planter & instructions
• 100% Growth Guarantee — seeds don't sprout? We replace them free

Grow Your Own Onion from Seed

The Seeds In A Cup® Onion Grow Kit is a complete seed-to-sprout system for growing Allium cepa at home. Curated by Kevin Bruce, expert horticulturalist, this kit gives you everything you need to grow fresh homegrown onion from seed. Perfect for kitchen gardens, apartment balconies, classrooms, and anyone who wants to know exactly where their food comes from.

Rated Difficulty Level 1 (Beginner) — no prior gardening experience needed. Germination typically occurs in 7-14 days under proper conditions. Plants can reach 12-18 inches at maturity and thrive in full sun (6-8 hours daily).

What's Included in Your Onion Grow Kit

• Premium Non-GMO Allium cepa Seeds — batch-tested for high germination rates (2-7+)
• Real Loose Potting Soil — nutrient-rich growing medium, not compressed coir discs
• Recyclable Planter with Lid — clear lid doubles as a humidity dome for germination and a saucer for drainage
• Step-by-Step Growing Instructions — detailed care guide from seed to transplant, written by Kevin Bruce

No extra supplies needed. Just add water and sunlight.

How to Grow Onion from Seed: Quick-Start Guide

1. Plant: Fill your planter with the included soil. Plant onion seeds at the depth indicated in your instructions. Mist with water and place the clear lid on top.
2. Germinate: Keep soil warm and moist. Seeds typically sprout in 7-14 days. Remove lid once seedlings emerge.
3. Grow: Place in full sun (6-8 hours daily). Water when the top inch of soil feels dry. Follow the included care guide for feeding and transplant timing.

Onion Plant Profile

Scientific Name	Allium cepa
Plant Type	Biennial Vegetable
Difficulty Level	Beginner
Germination Time	7-14 days at 65-75F
Mature Height	12-18 inches
Sunlight Needs	Full Sun (6-8 hours daily)
USDA Hardiness Zones	3-9 (Outdoor); All Zones (Indoor)
Planting Season	Early Spring
Seeds Included	2-7+

Frequently Asked Questions

What is included in the Seeds In A Cup Onion Grow Kit?

Every kit includes premium non-GMO Allium cepa seeds, real loose nutrient-rich potting soil, a recyclable planter with clear humidity lid, and detailed growing instructions written by expert horticulturalist Kevin Bruce. No additional supplies are needed.

How long does onion take to grow from seed?

Allium cepa seeds typically germinate in 7-14 days under proper conditions (7-14 days at 65-75F). Plants can reach 12-18 inches at full maturity. Growing conditions including light, temperature, and watering will affect growth rate.

Can I grow onion indoors?

Yes! This kit is designed for indoor growing on windowsills, countertops, and in apartments. Onion needs full sun (6-8 hours daily) for best results. A south-facing window is ideal. Grow lights can supplement natural light in lower-light spaces.

Where are Seeds In A Cup kits made?

Every Seeds In A Cup® kit is hand-assembled and ships from our headquarters in Cleveland, Ohio, USA. We are a Made in USA company using American-sourced materials and supporting Midwestern agriculture standards.

What if my seeds don't sprout?

We stand behind every kit with our 100% Growth Guarantee. If your seeds do not germinate, contact our support team and we will send you replacement seeds at no charge. We batch-test all seeds in Cleveland to ensure high germination rates.

About Seeds In A Cup®

Seeds In A Cup® provides complete seed starter kits designed for first-time growers to experienced gardeners. Every kit combines premium loose potting soil, high-germination non-GMO seeds, and clear instructions in 100% recyclable packaging. Hand-assembled in Cleveland, Ohio with a 100% Growth Guarantee.

Expert Guidance: All growing instructions and care guides are developed by Kevin Bruce, expert horticulturalist, ensuring accurate and reliable plant care information you can trust.