Helianthus Lemon Max

Undaunted® Lemon Max Perennial Sunflower


4-5 feet tall x 4-5 feet wide. Lemon Max is a sensational bloomer with an explosion of huge, clear yellow August daisies. A big strapping plant, give Lemon Max plenty of room to grow. Well-suited to any type of soil, including clay. Well suited to habitat gardens--birds will relish the seeds and native bees are fond of the nectar-rich sunflowers. Discovered by Lauren Ogden in her Ft. Collins garden. A Plant Select winner.

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Zones 4 - 8
Light Requirements
Full Sun
Full Sun
Annual Rainfall
Drought Resistant / Waterwise
10 to 20", 20 to 30", 30 to 40" (with care)
Bloom Time Early summer to fall
Shipping Shipping begins in late February based on ground temperatures, warmest zones first. Learn More…
Size Plant - 5" deep pot


4-5 feet tall x 4-5 feet wide. Lemon Max is a sensational bloomer with an explosion of huge, clear yellow daisies in August. A big strapping plant to about 5 ft. in height and of equal girth, give ‘Lemon Max’ plenty of room to grow; it's especially well-suited to meadows and habitat gardens. While at home in any soil type, the plant loves clay. Birds will relish the seeds and the native bees are especially fond of these nectar-rich sunflowers. A garden hybrid discovered by Lauren Springer Ogden in her Fort Collins garden. A Plant Select winner. (Cutting propagated.)
Common Name Undaunted® Lemon Max Perennial Sunflower
Botanical Name Helianthus ‘PUND03S’
Zones 4, 5, 6, 7, 8
Light Requirements Full Sun
Flower Color Yellow
Mature Height 4-5 ft. tall
Mature Spread 4-5 ft. wide
Bloom Time Early summer to fall
Ships As Potted Plant
Native Yes
Planting Time Spring / Summer
Soil Type Clay Soil, Sandy Soil, Average Soil, Compost Enriched Garden Loam Soil
Soil Moisture Drought Resistant / Waterwise
Amount of Rain 10 to 20", 20 to 30", 30 to 40" (with care)
Advantages Native
Special Groups High Country Gardens Exclusive, High Country Gardens Introduction
Ideal Region Anywhere In The US, Suitable Above 7000 ft
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada No

Planting Guides

View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.


Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first. Most plant orders will arrive within 3-4 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.

Grass Plugs Will ship at planting time in spring 2017, beginning in late February.

Wildflower Seed & Grass Seed Orders ship within 2-3 days.

Standard shipping costs are $4.99 and up, depending on the size of the order.

Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.

More Shipping Info

Reviewsby PowerReviews


by PowerReviews
High Country GardensHelianthus Lemon Max

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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Long lasting later Summer/ early Fall color


from East Oregon

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  • Accurate Instructions
  • Attractive
  • Hardy
  • Healthy


    Best Uses

    • Garden

    Comments about High Country Gardens Helianthus Lemon Max:

    Grew large and healthy very quickly. Perfect for my permaculture edible yard.
    I have read the roots are edible -will have to research.

    • Primary use:
    • Personal

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    Q & A

    USDA Hardiness Planting Zones

    To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

    • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
    • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

    Find Your Planting Zone:

    Enter your Zip Code to find your USDA Planting Zone

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