Slo-Bolt · Coriandrum sativum
Two plants in one: a culinary herb in leaf stage, a major insectary plant when it bolts. Slo-Bolt stays in leaf longer, then opens into white umbel flowers that parasitic wasps cannot resist.
Herb Profile · Jamie's Garden 2026 · Santa Monica Mountains · 1,170 ft elevation
| Variety | Cilantro, Slo-Bolt |
| Species | Coriandrum sativum |
| Family | Apiaceae |
| Selection | Specifically bred for delayed bolting in warm conditions |
| Container | 3 gal |
| Garden Role | Culinary herb · major insectary plant when flowering |
Slo-Bolt is a cilantro variety selected specifically for its resistance to bolting — the tendency of cilantro to flower and go to seed quickly in warm weather, which ends the leafy harvest phase. In California summers, standard cilantro bolts within weeks of transplant. Slo-Bolt extends the leaf production phase significantly, providing more time for harvesting the herb before it transitions to its ecological phase.
The ecological phase is the reason this variety earns its space beyond the kitchen. When cilantro flowers — the inevitable result of every cilantro plant's ambition — the small white umbel flowers are among the most effective insectary plants available, specifically attracting parasitic wasps, lacewings, and hoverflies that prey on aphids, whiteflies, and caterpillars.
Cilantro in flower is a major hub for predatory and parasitic insects in this garden. The small white umbel flowers provide nectar that is specifically accessible to beneficial insects with short mouthparts — parasitic wasps, tachinid flies, lacewings. These insects are the primary natural control for aphids, whiteflies, caterpillars, and thrips across the garden system. Do not deadhead bolted cilantro — let it flower fully.
| Habit | Upright · feathery leaves · umbel flowering |
| Height | 1–2 ft in leaf · taller when bolting |
| Container | 3 gal |
| Succession | Sow every 3–4 weeks for continuous leaf harvest |
| Bolting | Inevitable in warm weather — embrace it as insectary phase |
| Seeds | Coriander seeds are edible and useful |
Succession sowing is the key to continuous cilantro leaf harvest — start a new container every 3–4 weeks so when one bolts, the next is ready for harvest. Do not try to prevent bolting in California summer — it will happen. Instead, manage succession and harvest each plant's leaf phase fully before it transitions. When it bolts, relocate it to where insectary function is most needed.
Cilantro · Jamie's Garden 2026 · Santa Monica Mountains · 1,170 ft
Cilantro in this garden operates at two levels simultaneously, which is the kind of efficiency I appreciate. Level one: fresh leaves for every Mexican preparation this garden's tomatillo and pepper crops will generate. Level two: the flowering plant as one of the most effective beneficial insect attractors in organic horticulture.
The Slo-Bolt selection matters because it extends the time the plant spends being useful in the kitchen. Standard cilantro in California summer is bolt-prone to the point of being frustrating. Slo-Bolt gives enough time to actually use it.
And when it does bolt — which it will — the transition from culinary herb to insectary plant is a gift the garden did not have to plan. It just happens. The plant finishes its kitchen work and begins its ecological work, and all you have to do is leave it alone.
| Variety | Cilantro, Slo-Bolt |
| Selection | Delayed bolting in warm conditions |
| Garden Function | Culinary herb + insectary when flowering |
| Key Insects | Parasitic wasps · lacewings · hoverflies |
| Container | 3 gal |
| Management | Succession sow every 3–4 weeks |