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2019 Seed Catalog

Colues Giant Exhibition Magma
Coleus Giant Exhibition Magma plants Coleus Giant Exhibition Magma close-up Coleus Giant Exhibition Magma in container

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Giant Exhi­bition Magma

Coleus Seeds

Gigantic molten purple-red leaves wrapped in a green ribbon. Plants grow to 20 in. tall in afternoon or filtered shade and moist soil.

In the Swallowtail Garden Seeds test garden, we found Giant Exhibition Magma coleus to be stunning - the kind of plant that will hold a viewer's attention no matter the setting or surroundings.

20 seeds - $3.99
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Growing Giant Exhi­bition Magma Coleus Seeds

Bee introduces how to plant

Plant Giant Exhibition Coleus Seeds: Sow seed in cell packs or flats, use a sterilized soil-less mix. Press seeds into soil, do not cover. Needs light to germinate. Kept at 70-75°F., seedlings emerge in 10-14 days. After all danger of frost transplant into 4 in. containers, or into the garden 12 to 18 in. apart. Direct sowing is not recommended.

Grow Giant Exhibition Coleus: Part sun to light shade. Rich, moist soil. Remove flowers as they form to keep coleus foliage visible, healthy and growing. Near the end of the season, allow some of the nectar-rich flowers to form. Blooms will attract hummingbirds and butterflies. Giant Exhibition series coleus are excellent container plants, and can even be grown indoors in a brightly lit window.

Shipping Information

U.S. Shipping Rates

Free shipping on U.S. orders over $45.00.
Free priority shipping on U.S. orders over $125.00.

Standard U.S. shipping is $5.95.
Priority U.S. shipping is $9.95.


International Shipping Rates

Shipping to Canada is $9.95.
International shipping to all other countries is $14.95.

Satisfaction Guarantee

We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacement packets or issue a refund.