• Seeds In A Cup American Flax (Linum lewisii) Grow Kit - Complete seed starter with recyclable planter, non-GMO seeds, and real potting soil. Hand-assembled in Cleveland, Ohio, USA.
  • American Flax (Linum lewisii) seed starter kit contents: premium non-GMO seeds, nutrient-rich loose potting soil, and recyclable planter with humidity lid by Seeds In A Cup - Made in USA.
  • Hands-on STEM gardening: Planting American Flax (Linum lewisii) seeds in Seeds In A Cup recyclable planter. Educational seed-to-sprout project for kids and classrooms.
  • Healthy American Flax (Linum lewisii) seedling in Seeds In A Cup recyclable planter. Demonstrates successful germination with real potting soil and non-GMO seeds.
  • Seeds In A Cup American Flax grow kit with all contents: non-GMO seeds, real loose potting soil, recyclable planter, and growing instructions. Made in Cleveland, Ohio.
  • Complete Seeds In A Cup American Flax growing system: recyclable planter, premium soil, and non-GMO Linum lewisii seeds. Indoor seed starter kit made in Cleveland, Ohio, USA.
1 6

American Flax Grow Kit | Seeds In A Cup®

$10.99 USD
$10.99 USD
$10.99 each
Sale Sold out
Shipping calculated at checkout.

Secure checkout

Fast processing

Trusted support

Clear variant selection

In stock

SIAC-TGK-SDFSD

The Seeds In A Cup® American Flax Grow Kit | Seeds In A Cup® kit is a beginner-friendly indoor growing kit that includes non-GMO seeds, premium potting soil, a recyclable planter, and step-by-step instructions.

For deeper care strategies, read our comprehensive American Flax Grow Kit | Seeds In A Cup® growing and harvesting guide.

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 American Flax from Seed

The Seeds In A Cup® American Flax Grow Kit is a complete seed-to-sprout system for growing Linum lewisii at home. Curated by Kevin Bruce, expert horticulturalist, this kit gives you everything to grow fresh american flax from seed. Perfect for windowsills, garden borders, and anyone who wants beautiful, thriving plants at home.

Rated Difficulty Level 1 (Beginner) - no prior gardening experience needed. Germination typically occurs in 14-21 days. Plants can reach 12-24 inches at maturity in full sun (6-8 hours daily).

What's Included in Your American Flax Grow Kit

  • Premium Non-GMO Linum lewisii Seeds — batch-tested for high germination (10-20 seeds)
  • Real Loose Potting Soil — nutrient-rich growing medium, not compressed coir discs
  • Recyclable Planter with Lid — humidity dome for germination, saucer for drainage
  • Step-by-Step Growing Instructions — detailed care guide by Kevin Bruce

No extra supplies needed. Just add water and sunlight.

How to Grow American Flax from Seed: Quick-Start Guide

  1. Plant: Fill planter with soil. Plant seeds at indicated depth. Mist and place lid on top.
  2. Germinate: Keep warm and moist. Seeds sprout in 14-21 days. Remove lid once seedlings emerge.
  3. Grow: Place in full sun (6-8 hours daily). Water when top inch of soil is dry. Follow care guide for feeding and transplanting.

American Flax Plant Profile

Scientific Name Linum lewisii
Plant Type Perennial Wildflower
Difficulty Level Beginner
Germination Time 14-21 days at 60-70F
Mature Height 12-24 inches
Sunlight Needs Full Sun (6-8 hours daily)
USDA Hardiness Zones 3-9 (Outdoor); All Zones (Indoor)
Planting Season Spring or Fall
Seeds Included 10-20 seeds

Frequently Asked Questions

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

Every kit includes premium non-GMO Linum lewisii seeds, real loose potting soil, a recyclable planter with humidity lid, and growing instructions by Kevin Bruce. No additional supplies needed.

How long does american flax take to grow from seed?

Linum lewisii seeds typically germinate in 14-21 days. Plants can reach 12-24 inches at maturity. Light, temperature, and watering affect growth rate.

Can I grow american flax indoors?

Yes! This kit is designed for indoor growing. American Flax needs full sun (6-8 hours daily). A south-facing window is ideal. Grow lights can supplement in lower-light spaces.

Where are Seeds In A Cup kits made?

Every kit is hand-assembled and ships from Cleveland, Ohio, USA. We are a Made in USA company using American-sourced materials.

What if my seeds don't sprout?

Our 100% Growth Guarantee means if your seeds don't germinate, we replace them free. We batch-test all seeds in Cleveland for high germination rates.

About Seeds In A Cup®

Complete seed starter kits for first-time growers to experts. 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: Growing instructions developed by Kevin Bruce, expert horticulturalist.

View full details

Complete the Garden

Grow guide & specs

Difficulty
Beginner
Germination
14-21 days
USDA zones
Annual (all zones)
Sunlight
Full Sun (6-8 hours daily)
Water
Low — flax is drought tolerant once established
Mature height
12-36 inches (30-91 cm)
Planting season
Indoor: Any time of year | Outdoor: Early spring (cool weather crop)
Seeds included
10-20 seeds
Scientific name
Linum usitatissimum

What's included

  • Premium non-GMO Linum lewisii seeds, real loose nutrient-rich potting soil, recyclable planter with clear lid, and step-by-step growing instructions. No extra supplies needed.

How to grow it

PLANTING: Open your Seeds In A Cup kit. Fill your container with the provided growing medium. Scatter seeds on the surface and cover lightly with ⅛ inch of medium. Water gently. Place in a cool, bright location (60-70°F) or under a grow light for 14-16 hours/day. Germination occurs in 7-14 days.

SEEDLING CARE: Flax seedlings are slender and grasslike. Provide bright light and keep soil lightly moist. Flax does not transplant well — if growing outdoors, direct sow after last frost.

HARVEST: Flax flowers appear in late spring. Each flower lasts only one day but plants produce many buds over several weeks. For seeds, allow seed capsules to dry and turn brown on the plant before harvesting. For fiber, harvest stems when lower leaves begin to yellow.

How To Grow Information:

Expert growing advice tailored for your plant

Grow Your Own Tree: A Sustainable Journey from Seed to Shade - Seeds In A Cup®

Grow Your Own Tree: A Sustainable Journey from Seed to Shade

Read the full guide →
Seedlings growing in Seeds In A Cup® kits across different climate conditions

Growing from Seed in Different Climates: A Guide

Read the full guide →
Seeds In A Cup® seed starter kit sprouting — the perfect starting point for a home garden

Seeds in a Cup: Your Garden's Perfect Starting Point

Read the full guide →
Browse all growing guides

What People Say:

Grow More with A Friend:

View all — Best Sellers — Most-Loved Grow Kits

Frequently Asked Questions

What is included in a Seeds In A Cup® grow kit?
Every kit includes non-GMO seeds, Premium Nutrient-Rich Potting Soil, a 100% Recyclable Planter, a humidity lid, and easy step-by-step growing instructions — everything you need to grow from seed at home.
What if my seeds don't sprout?
You're covered by our Seed Growth Promise: if your seeds don't sprout, we replace them free. Just contact us and we'll make it right.
Where are Seeds In A Cup® kits made?
Every kit is hand-assembled in Cleveland, Ohio — the Forest City — using components sourced in the USA.
Do you offer bulk or corporate gifting orders?
Yes. We supply bulk grow kits for corporate gifts, weddings, memorials, and events with volume pricing and custom options. Visit our Bulk & Corporate Gifting page to request a quote. Request a bulk quote.