Soak and start
Soak seed for a day, then sow 1/4–1/2" deep in deep cells, in darkness, 4–5 weeks ahead.
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A seed worth growing
A striped, ruffled Spencer sweet pea.
Blue Ripple is a Spencer sweet pea whose petals are streaked and flecked lavender-blue, with a blue line around the slightly ruffled edge, like sea glass. Each 9–12" stem carries 3–4 blooms, and the flowers are mildly fragrant.
Like other Spencer types, it is a late bloomer that needs 12 or more hours of daylight to flower, while modern winter-flowering kinds bloom at 10–11 hours. Hummingbirds visit the flowers.
Plants grow 72–96" tall and flower about 75–85 days from sowing. Open-pollinated.
In stock — Packet
Know before you sow
Growing times vary with weather, soil and local conditions.
Soak seed for a day, then sow 1/4–1/2" deep in deep cells, in darkness, 4–5 weeks ahead.
Pinch at 6–8" and give the vines netting to climb; space 4–8" apart.
Rich, moist, well-drained soil at pH 6–7, mulched with straw or white plastic.
Cut when half the flowers on a stem are open; regular picking keeps blooms coming.
14–21 days at 55–65°F (13–18°C). Soaking the seed in room-temperature water for a day before sowing helps it along.
Sow 1/4–1/2" deep in 72-cell trays or deeper cells 4–5 weeks before planting out, and keep them covered, as the seed needs darkness to sprout.
Sow 2–3 seeds every 6", 1/4–1/2" deep. Seedlings shrug off a light frost. Thin as needed once the first true leaves open.
Pinch the tips when plants are 6–8" tall for bushier vines and more flowers. The vines must climb, so put up netting or another trellis before they need it.
Full sun.
72–96".
4–8".
Grown as an annual.
6–16".
4–6 days. Sweet peas do not hold well in storage; if you must, keep them at 36–39°F (2–4°C).
Cut when about half the flowers on the stem are open. The more you pick, the more the vines bloom.
Deep, rich, loamy soil that stays moist but drains well, ideally at pH 6–7.
A white-on-black plastic mulch or a thick layer of straw keeps the roots cool and the vines flowering longer.
Cutting, the back of borders, and covering fences, trellises and arbors in a cottage garden.
Lathyrus odoratus
50 seeds.
About 300 on average.
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