"I have several DA roses that perform adequately but not as well as I'd hoped. Any suggestions for DA roses that thrive in Southern California's dry climate? My yard doesn't offer them much shade so the sun really hits them."
Oakslesly, last night I came across a David Austin 2019 rose catalog which I purchased, and here are the roses they recommend for hot and dry areas:
The Ancient Mariner (Mid pink, "masses of very large blooms, 4' x 4' for borders and hedges), and also in the lists for best roses in "hot and humid climates" , and "cold climates", and "most fragrant roses" so it must be a real winner!
Grace (apricot), good for pots/containers, mixed borders, and shady areas, 4' x 4', "free-flowering blooms held on broad arching growth"
Boscobel (Coral-pink"very fragrant, upward-facing blooms", 4' x 4', ideal for cut flowers, and mixed or rose border
Gertrude Jekyll (Bright Pink)--Climbing rose, also in the list for shady areas, cold climates, and most fragrant lists (od rose scent) upt o 10ft., ideal for obelisk or pillar, and doorway
The Alnwick Rose (soft pink)--also in the lists for hot and humid climates, cold climates, 4' x 3', Med. Old Rose scent with hint of raspberry, good for pots and containers, rose hedges, mixed and rose border
Olivia Rose Austin (mid pink)--also in the lists for best roses for shady areas, cold climates, hot and humid climates, most abundantly flowering roses lists, "most healthy and tolerant" (meaning most disease resistant), 3 1/2' x 4 1/2'
Vanessa Bell (pale yellow) --Especially fragrant, "large clusters of very pretty, pale yellow blooms, ideal for pots and containers, small spaces, mixed border and rose hedges, 4' x3'
Roald Dahl (apricot)--"bears perfect apricot blooms almost continuously throughout the summer", also noted for being disease-resistant with few thorns, and does well in shady areas as well, and suitable for pots and containers, cut flowers, and rose hedges and borders, and mixed borders.
Tess of the d'Ubervilles (Crimson-red)--"a compact climber" to 8', good for doorways or a 6' wall or fence, with med. old rose fragrance.
Claire Austin (creamy white)-- climbing rose to 12', creamy white, strong "wonderful" myrrh fragrance ("with dashes of meadowsweet, vanilla, and heliotrope, a "vigorous, upright rose" with "pleasingly cupped, pale lemon buds which gradually open to large, creamy white flowers, the outer petals perfectly arranged in concentric circles."
The Mayflower (med. pink)-"A very healthy variety", med. strong Old Rose fragrance, 4 1/2' x 3 1/2', ideal for hedges, borders, and shady areas
Carding Mill (pink, apricot, and yellow blend)--good in pots and containers, small spaces, mixed border, 4' x 3 1/2', "lovely myrhh fragrance.
Tranquillity--open up pure white with a light apple fragrance, 4' x4', good in pots and containers, for cuttings, and mixed and rose border
The Lady Gardener (apricot)--"bears large, quartered rosettes' (4" across), "a lovely Tea fragrance with hints of cedar wood and vanilla", 4' x 4 1/2'. hedges, borders, and cuttings.
Golden Celebration--(rich yellow blooms) "free flowering..with a strong, delicious fragrance..4 1/2' x 4 1/2', mixed border
I think these would be best for my area as well, so I hope listing these Austins in detail will help me remember them!
As far as fertilizing, the catalog suggests feeding them early after pruning and after growth begins in Feb., and after each flush in May, July, and Sept., 6-8 wks. between each feeding, and apply a 3" mulch in the spring.