Good King Henry seed is notoriously difficult to germinate. We went through several batches, stratification methods until we cracked the code. For Zone 7b direct sow in deep flats of sterile potting soil or in the garden in mid-December. Try varied dates. Stratify in a 5-6” deep undivided flat outdoors for 12 weeks beginning in mid January, then bring indoors to germinate. You can also try 10 weeks in the fridge in Perlite or sand, then set under grow lights. The key is fresh seed. Unlike many other seeds, viable Good King Henry seeds float. Early plants have one tap root. Read our Blog ‘How to Germinate Your Seeds’. Soil pH 5.6-7.8. Hardiness zones 3-9. Perennial.
Usual seed life: 5 years.
Planting Depth
1/4”Soil Temp. Germ.
60˚F stratify
Days to Germ.
70-80Plant Spacing
12-18”Row Spacing
24”Days To Maturity
300Part Shade,
Moist Well Drained