Sowing: Sow direct in spring
This species does well in all zones, and although it is considered a perennial in hot areas, it is grown as an annual in temperate zones. They do not perform as well in areas where temperatures get below minus 4°C (25°F). If the plants are in an area that will not receive frosts, they can be planted earlier in the year, around February. Seeds are usually broadcast in spring, but in warm areas can also be sown in the autumn.
Eschscholzia have a long taproot and dislike transplanting, so it is better to sow them directly outdoors where they are to flower. They do best in an open sunny open site as the blooms do not open in shade but will grow in most soils.
Prepare the ground well and rake to a fine tilth before sowing. Mark the sowing areas with a ring of light coloured sand and label if sowing more than one annual in the same bed.
Sow seeds in short drills 1mm (1/8th in) deep in rows 30cm (12in) apart once temperatures reach around 20°C (68°F).
Seeds germinate in two weeks. The seedlings will appear in rows a few weeks after planting and can be told from nearby weed seedlings quite easily. Thin the seedlings out so they are finally 10 to 15cm (4 to 6 in) apart by early summer.
Alternatively, leave them to grow as small clumps, of 4 to 6 plants every 30cm (12in) or so. Keep the compost slightly moist, but not wet at all times especially in warm temperatures.
Cultivation:
Prefers well drained soil enriched with manure or compost ahead of planting.
Feeding is rarely needed but water well if there are prolonged periods of drought. Apply complete plant food as growth begins in the spring.
Remove spent flowers to encourage prolific blooming. At the end of the season, if required, leave a few plants to die down and self seed. Others can be pulled up and composted.