The Well-Tended Perennial Garden The Essential Guide to Planting and Pruning Techniques, Third Edition

irrigation. Areas with moderate
summers produce the prettiest
specimens. This species prefers a
somewhat acid site and will need light
or medium shade in all but the coolest
regions. Dig and split plants in early
spring or fall to maintain vigor, or
simply allow self-sown seedlings to
replace tired plants. Top-dress with
compost in late fall or early spring
before new growth emerges.
related plantS ‘Miller’s Crimson’
and ‘Postford White’ are the most
popular named varieties of Primula
japonica and should come true from
seed.

Pseudofumaria lutea

(syn. Corydalis lutea)

yellow corydalis

p apaveraceae

Tubular yellow flowers; fernlike green

leaves

12–15 in. high; 15–18 in. wide

Part shade

Blooms May–September

Zones 5–7

pruning Deadheading seems to

prolong bloom and reduces prolific

seeding. Do be certain, though, to

allow some seeding, or the species may

be lost from the garden. Plants scorch

Primula japonica