Lilliput Mix Zinnia Seeds

Sow Zinnia Lilliput Mix seeds straight into garden soil after the last frost, once the ground temperature holds above 70°F. Plant each seed about ¼ inch deep, 6 to 9 inches apart, in rows roughly 12 inches apart, and water the area after sowing. Germination takes 4 to 7 days in warm soil. Zinnias resent root disturbance, so we don’t recommend starting seeds inside. Sow a second batch 3 weeks after the first and you'll have blooms right until October.

Lilliput Zinnias need full sun for at least 6 hours a day, and ideally more — anything less and the colors come out muted, the stems get lanky, and bloom production drops off sharply. They can grow in basically any soil, but give them well-drained, compost-amended ground at a near-neutral pH and you will get bigger flowers and sturdier stems. Water at the base of the plant once or twice a week during dry stretches, soaking deeply each time rather than sprinkling often. Avoid overhead watering once the plants are established, because powdery mildew is the one disease zinnias actually catch, and a wet leaf in still humid air is basically an invitation. A light dose of balanced fertilizer at planting and again at first bud is plenty — over-fed plants grow lush green foliage and skip the flowers, which defeats the purpose.

Pinch the central stem of each plant when it reaches 6 inches tall, snipping just above a leaf pair, and the plant will branch out from the cut and produce close to twice as many flowers. Deadhead spent blooms as you walk past — zinnias slow down once seed sets, and a 20-second pass with scissors every few days keeps them blooming for weeks longer. Cut flowers for the vase when the petals are fully open and the stem just below the bloom feels stiff (the so-called wiggle test — if the head flops, it's too early to pick). Spacing matters more than gardeners think — cram them in close and mildew sweeps through the patch by August, so respect the 6 to 9 inch gap even when the seedlings look ridiculously small. Leave a few late-season heads to dry on the plant, crumble them into a paper envelope, and you have next year's seed — Lilliput is open-pollinated and comes back true to type.