How to Plant Stella de Oro Daylilies

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Cat-toxic "Stella de Oro" poses no threats to dogs.
Image Credit: TrudyWilkerson/iStock/Getty Images

A miniature daylily with enormous ornamental punch, "Stella de Oro" (Hemerocallis "Stella de Oro") packs an abundance of riches onto its 1-foot high frame. In U.S. Department of Agriculture plant hardiness zones 3 through 10, its buttery-gold, ruffled trumpet flowers open from late spring to late summer. In mild-winter areas, its gracefully arching foliage remains green all year. Plant it properly, and one "Stella de Oro" may eventually produce 400 blooms in a single growing season.

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When to Plant

Climate dictates the best time of year to plant bare-root "Stella de Oro." In hot-summer, mild-winter climates where the soil doesn't freeze, fall planting lets them establish and leaf out before extremely hot temperatures arrive.

In cold-winter climates, plant bare-root "Stella de Oro" in spring at least 60 days before summer temperatures are likely to peak. Planting in fall increases the chances of the roots' not establishing before the ground freezes.

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As long as their root balls aren't disturbed, nursery container plants can go in the ground whenever the soil is workable.

Where to Plant

For maximum flowering, "Stella de Oro" needs at least six hours of daily sun. In most cases, plants in direct afternoon sun produce more flowers than those getting mostly morning sun. The exceptions are plants in very hot summer climates, and -- in some instances -- those planted in the shade of light-colored buildings.

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Give hot-climate plants full morning sun, with shade between noon and late afternoon. Indirect, reflected light may be enough for the building-shaded plants to bloom their best; if it's not, they're easily transplanted. "Stella d'Oro" rarely flowers in deep shade.

Never plant "Stella de Oro" where its toxic leaves might tempt the family cat.

Site Preparation

Prepare a site large enough to space the "Stella de Oro" daylilies 1 to 1 1/2 feet apart.

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Loosen the top 1 to 1 1/2 feet of the planting bed with a spade or tiller and work in a 3- to 4-inch layer of an organic soil amendment, such as well-aged compost or manure.

Also work in a granulated fertilizer with a 3:1:2 ratio of nitrogen, phosphorous and potash, as indicated by the N-P-K numbers on the label. One manufacturer, for example, recommends lightly scratching 1 1/4 cups of its 6-2-4 fertilizer granules into each 10 square feet of soil and watering well.

Follow your fertilizer label's application instructions, because brands vary according to formula.

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Planting Methods

If the bare-root plants' roots are dry, submerge them in water for one or two hours before planting. Water a dry potted "Stella de Oro" until liquid runs from its drainage holes.

Cut bare-root plants' leaf fans back to 6 to 8 inches above the roots, trimming the tops into inverted "Vs." Use clean, sharp scissors disinfected between cuts in rubbing alcohol.

Dig holes wide enough for the roots. In a cold-winter climate, dig deeply enough for roots' tops to sit 1 inch below the soil line; elsewhere 1/2 inch is acceptable.

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Hold a bare-root plant upright, center it in a hole and backfill with loose soil. Hold a container plant by its base, invert the container and slowly slide it free. Shake the rootball gently and trim damaged or encircling rots with sharp, disinfected stem cutters. Spread the roots, center it in a hole and backfill.

Tamp the soil lightly to eliminate air pockets. Water the transplants deeply enough to soak the roots, and cover the planting bed with a 2- to 3-inch layer of moisture-retaining organic mulch.

Watering After Planting

To establish quickly and perform well, "Stella de Oro" needs 1 inch of weekly rain or supplemental water, or about 6 gallons per 10 square feet of soil.

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When the top 2 to 4 inches of soil feel dry or are too compacted to dig easily, water slowly so that the moisture sinks to the roots. For plants in loamy or clay soil, one weekly watering is generally enough. In sandy soil, water twice weekly with one-half the required amount.

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references & resources

Judy Wolfe

Passionate for travel and the well-written word, Judy Wolfe is a professional writer with a Bachelor of Arts in English literature from Cal Poly Pomona and a certificate in advanced floral design. Her thousands of published articles cover topics from travel and gardening to pet care and technology.