Product Field NotesCompanion Plants
Lemon Meringue False Indigo: Yellow Spikes on Charcoal Stems
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Lemon Meringue false indigo is a vigorous yellow baptisia with a trick of contrast: soft lemon-yellow flower spikes carried on dark charcoal-gray stems above blue-green leaves. It blooms in late May and early June, earned top marks in multi-year public garden trials, and grows into a broad, vase-shaped plant that can live for decades in the right spot.
Lemon Meringue at a glance
| Trait | What to expect |
|---|---|
| Botanical name | Baptisia 'Lemon Meringue' |
| Flowers | Lemon-yellow pea flowers on 10 to 12 inch spikes, charcoal stems |
| Foliage | Blue-green, three-parted leaves |
| Size | 36 to 46 inches tall, widening to 5 or 6 feet with age |
| Bloom | Late May, peaks early June |
| Hardiness | USDA zones 4 to 9 |
| Light | Full sun to part shade |
| Wildlife | Great for pollinators; deer resistant |
Why it works with lavender
False indigo has a deep taproot and wants exactly what lavender wants: sun, lean soil and drainage. Plant the two together and neither one needs special handling. Lemon Meringue blooms just ahead of the lavender, so the yellow spikes carry the bed through late spring, and its blue-green mound becomes a cool backdrop once the purple spikes arrive.
Size is the thing to plan for. A mature plant can spread 5 to 6 feet, so put it behind or at the end of a lavender row, not in the middle, where it would shade and crowd the lavender. Try placements in the Companion Plant Planner.
Planting for the long haul
- Pick a permanent spot. Established baptisias do not like to be moved because of that taproot.
- Soil: lean to average and well drained. Soggy winter soil is the main cause of loss.
- Patience: expect a couple of seasons before it settles in and blooms fully. Then it just keeps getting better.
- Water: regularly the first season, then rarely.
- Airflow: give it room so the foliage stays clean in humid summers.
After the flowers
Dark seed pods follow the bloom and can stay on the plant into fall and winter. Leave them for interest, or cut the stems down in late fall. No winter protection is needed in Michigan. For cut flowers, take a few spikes as the lower flowers open; they last well in a vase.
Choosing a format
Lemon Meringue is offered as a 72-cell plug tray for growers and large plantings, and as a bare root plant for a single specimen in a home garden. See each product page for current availability.
Frequently asked questions
Is false indigo safe to eat?
No. It is grown as an ornamental and contains alkaloids that make it mildly toxic if eaten.
My new plant barely grew. Is something wrong?
Probably not. Baptisia spends its first seasons building roots. Keep it weeded and watered while young, and it will fill out.
Will it flop over?
In lean soil and sun it holds its vase shape well. Rich soil or too much shade make floppier growth.
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