Cilantro Slo-Bolt
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.
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.
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.
Why This Plant Is Here
Cilantro Slo-Bolt has a specific role in this year's garden: flavor, beauty, pollinator support, story, or seasonal production.