Propagating Marigolds from Seed: Complete Guide

Overview

Marigolds (Tagetes spp.) are annual flowers grouped into three categories: African (T. erecta), French (T. patula), and triploid hybrids. All originate from Mexican natives. Heights range from 6-12 inches (French), up to 3 feet (African), and just over 1 foot (triploid). Full sun maximizes flowering.

Step-by-Step Seed Propagation

Step 1: Prepare Planting Cells

Fill cells to ½ inch from top with quality seed-starting mix. Firm soil in each cell.

Step 2: Pre-moisten Soil

Add 1 inch water to irrigation tray. Set cells in tray to absorb moisture. Firm soil once more, then drain excess.

Step 3: Sow Seeds

Pinch 4-5 seeds per cell and scatter on soil surface. Cover with ¼ inch seed-starting mix. Press gently. Mist surface.

Step 4: Provide Optimal Conditions

Place in warm (65-75°F), well-lit area with 8-10 hours daily light. If natural light insufficient, use fluorescent lights 4-6 inches away for 10-12 hours. Seedlings emerge in 7-14 days.

Step 5: Thin Seedlings

When seedlings have a pair of true leaves, snip off all but the strongest in each cell at soil level.

Step 6: Transplant Outdoors

Move to garden when 2-3 inches tall and all frost danger has passed for your region.