Lathyrus chloranthus (Yellow Sweet Pea) [12 Seeds]


Germination Information: The usual advice is to nick the seeds and soak them overnight before sowing (1/4 to 1/2 inch deep) in warm, bright conditions in mid spring to early summer. As an experiment, I followed that protocol that on June 25 and the seeds started sprouting on July 5. (Your experience may vary.) Or, sow directly where you want them to grow in early to mid spring.

I find the plants grow most vigorously here from self-sown seedlings, so you could also try direct-sowing in fall or winter and see how that works for you. Or, try the winter-sowing approach.

Note that this information will not appear on the seed packet you receive.

Please read the description as well before ordering.

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Lathyrus chloranthus is a seldom-seen species of sweet pea in a color you don’t expect: some blooms are clear yellow and others develop orange shading. The 2020 growing season was the first time I tried this beauty in my garden. I didn’t expect much from it and was pleasantly surprised by its performance: the seeds produced good-looking, vigorous, well-branched vines with abundant, light green to grayish green foliage, and flowers appeared from early summer into early September. I have grown it every year since, mostly thanks to self-sown seedlings.

Don’t expect a traffic-stopping bloom display—the flowers are on the small side—and unlike more commonly grown sweet peas, this one does not have any fragrance. It’s still worth growing for its rarity and its uncommon color. I think this species would look terrific on a tripod of stakes in a large container, where the blooms would be closer to eye level. It also makes a great cover for wire or chain-link fencing. Here, it usually reaches somewhere around 4 to 5 feet tall but can get bigger in moist, rich soil. Full sun (in cooler areas, at least; my plants did well with shade during the hottest part of the day). Annual.

Collected in mid to late July 2023. At least 12 seeds. Shipping to US addresses only.

Please read the germination information as well before ordering.

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