On a whim, I picked up a six-pack of lisianthus (Eustoma grandiflorum) at a local nursery several years ago. It was worth a try to see if they would survive the incredibly hot summers here in the low desert of Arizona. I wasn’t sure how to grow lisianthus, and I was shocked when they grew well all summer, and some returned the following spring! The beautiful rose-like blooms were a pleasant surprise.
Lisianthus is now a summer staple in my low desert Arizona garden. Learn how to grow lisianthus with these ten tips.
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10 Tips for How to Grow Lisianthus
- Plant Lisianthus from Plugs or Transplants
Lisianthus is tricky to grow well from seed, even for seasoned nursery professionals. It’s best to purchase transplants or plugs from local growers, nurseries, or online retailers. Look for plugs or transplants with buds beginning to grow to ensure flowers are on their way.
- Spacing: Space lisianthus transplants about 4 inches apart. Closer spacing helps support tall plants.
- Transplanting: Plant transplants slightly higher than soil level to avoid stem rot.
- Watering: Keep transplants well-watered for at least two weeks and do not allow them to dry out.
- Square Foot Gardening: You can plant up to 8 lisianthus per square. Wider spacing yields larger plants.
- Grow Different Varieties of Lisianthus
Lisianthus comes in various heights and colors, making it versatile for different garden needs.
- Containers: Choose shorter varieties for container gardening.
- Support: Longer-stemmed types will require staking or netting.
- Colors: Common colors include cool tones of purple and pink, with blooms available in single or double types.
- Selection: Choose a variety that suits your aesthetic and garden needs.
- Plant Lisianthus at the Right Time
Transplants need 2-3 weeks of cool soil during transplant to prevent “rosetting.” Plant after the last frost date for your area.
- Timing: In the low desert of Arizona, plant lisianthus from March to June. Planting early in the season yields better results.
- Establishment: Early planting gives lisianthus time to establish before summer heat. If planting later, provide shade for new transplants until they are established.
