Phlomoides tuberosa (Tuberous Jerusalem Sage) [15 Seeds]


Germination Information: Please do not order these seeds unless you have experience handling seeds that benefit from a chilling period.

In my experience, sowing these seeds (gently pressed into the surface of the growing medium) in a pot in fall through midwinter and leaving it outdoors is likely to give the best results. (The winter-sowing technique is a good option.)

Some references say that it is possible for these seeds to germinate (though perhaps at a less than optimal rate) if you start them in warm, bright conditions (indoors under lights, for example, or outdoors in summer), giving them an artificial chilling period if they don’t germinate after about a month. I don’t have any experience starting them that way so cannot say whether that will actually work or not and can’t guarantee results.

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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Tuberous Jerusalem sage (Phlomoides tuberosa, formerly Phlomis tuberosa) is a distinctive sight in the summer border, with 3- to 4-foot-tall stemmed topped with tiered whorls of purplish pink flowers over mostly basal clumps of broad, deeply veined, deep green foliage. Leave the stems in place to enjoy the interesting seedheads for months. If you dig up the clumps to divide them at some point, you will notice the swollen parts on the roots (hence the “tuberous” part of the common name). Full sun. Zones 5 to 9.

2022-collected seeds are sold out. I hope to collect again in August 2023. At least 15 seeds.

Please read the germination information as well before ordering.

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