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Godetia, now classed as Clarkia amoena and sold as satin flower or farewell-to-spring, is a hardy annual from the coast and foothills of western North America. In its home range it germinates with the autumn rains, sits as a low rosette through a cool wet winter, and flowers as the dry season arrives. That is the pattern to copy. Where winters are mild, roughly where the ground rarely freezes solid and hard frosts are brief, sow in autumn and let the plants overwinter small.
Among the autumn-sown annuals it is one of the later ones to go in. Sowing too early in a warm autumn gives large soft plants that are more likely to rot or be damaged by cold than a compact rosette. Wait until the heat has properly broken and nights are cool. In cold-winter areas, where the soil freezes for weeks, sow in early spring instead, either indoors or in a cold frame, and plant out once the worst frosts are over. Spring-sown plants flower a little later and a little shorter, but they flower well.
| Climate | When to sow | Where |
|---|---|---|
| Mild winters, light frosts only | Mid to late autumn, after the heat breaks | Direct in the bed, or small pots in a cold frame |
| Cold winters, ground freezes | Early spring, about six weeks before planting out | Small pots indoors or in a cold frame |
| Hot summers, short spring | As early as your climate allows | Direct, so flowering beats the heat |
Germination: cool, moist and barely covered
The seed germinates best at about 59 to 68°F (15 to 20°C) and comes up in five to seven days at that range. Warmer than that and germination slows and becomes patchy, which is another reason not to rush an autumn sowing while the days are still hot. Indoors, a cool spare room or an unheated porch suits it far better than a heated propagator.
The seed is small, so cover it only thinly, with just enough fine mix or sieved soil to hide it and keep it from drying out. A heavy covering is the most common reason for a poor stand. Water the pots or the drill before sowing rather than after, so the seed is not washed into a clump, and keep the surface evenly moist until the seedlings are up.
- Fill small pots with seed mix Use pots about 2.5 inches (6 cm) across, filled with a fine, free-draining seed mix. Water them thoroughly and let them drain before sowing.
- Sow three or four seeds per pot Place the seeds on the surface a little apart from one another, then sprinkle over a thin layer of mix, just enough to hide them.
- Keep them cool and moist Stand the pots somewhere bright at around 59 to 68°F (15 to 20°C). Mist or water gently from below until the seedlings appear in about a week.
- Thin to one seedling Once the seedlings are big enough to handle, snip the extras at soil level with scissors and keep the strongest one. Pulling them can tear the root of the one you keep.
- Start a light feed at true leaves When the first true leaves open, give a dilute liquid fertilizer every week or so. Keep it weak; you want sturdy, compact plants, not soft ones.
Why the taproot rules everything
Godetia sends down a single taproot early, and a plant whose root is broken or bent at transplanting sulks, yellows at the base and often never catches up. That is why the standard method is one plant per small pot, grown on until it can be tipped out whole, rather than a seed tray that has to be pricked out. Sowing several seeds per pot and thinning gives you a guaranteed plant in every pot without any root disturbance.
Direct sowing avoids the problem entirely and is the easiest route where winters are mild. Sow thinly in shallow drills or small groups at the final spacing, cover lightly, and thin in stages until the plants stand 6 to 8 inches (15 to 20 cm) apart. A patch sown direct in autumn usually makes a sturdier, earlier flowering plant than anything raised in a pot.
Planting out at four true leaves
Pot-grown plants are ready to go out about forty days after sowing, when they have four true leaves and the first white root tips show at the drainage hole. Do not leave them in the pot much longer than that. Once the taproot starts to coil around the bottom it stays coiled, and the plant never anchors itself properly in the bed.
Water the pots an hour before planting so the root ball holds together, slide each plant out without squeezing the stem, and set it at the same depth it grew in the pot. Firm gently and water in. Spring-raised plants should be hardened off for a week first, standing outside by day and brought in on cold nights.
If a pot holds two seedlings that you could not bring yourself to thin, plant them out together as one clump rather than trying to tease them apart.
Common sowing mistakes
Most failures come down to three things: seed buried too deep, seed sown into warm soil too early in autumn, and seedlings raised in trays and then pricked out. Each one either stops germination or damages the root that the whole plant depends on. Get those right and godetia is one of the most reliable annuals to raise from seed.
Sowing too thickly is the fourth. Crowded seedlings stretch toward the light, their stems go thin and weak, and thinning them late disturbs the ones you mean to keep. Sow sparingly, thin early, and the plants that remain will be short-jointed and bushy.