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Alkaline clay StrawChicago zone 5a
'Alkaline clay StrawChicago zone 5a'  photo
Photo courtesy of StrawChicago Alkaline clay 5a
Member rose garden   Listing last updated on 29 Mar 2024.
Chicago, Illinois
United States
USDA Zone: 5a (-20 to -15 F / -28.8 to -26.2 C)
My garden is NW of Chicago, zone 5a, 38" annual rain & 29" of snow. Brutal summer heat up to 100 F. My soil is high in magnesium at pH 7.7. I fix my clay with gypsum & pine bark. Austin, French Meilland, and hybrid tea like my alkaline clay. Albas, damasks, hybrid perpetual, and esp. Rugosas & hybrid Musk prefer sandy and loamy soil & need good drainage. Multiflora prefers high-rain & acidic loamy soil, but wichurana (Dr. Huey) prefers drier & alkaline clay.

Gypsum helps with root-growth. Sulfate of potash helps to induce blooms. Most of my 110+ varieties are own-root, with a few grafted on Dr. Huey. I don't spray. In my dolomitic heavy clay, pH 7.7, roses are healthy if I dig deep enough for drainage (2.5 feet), and fix my alkaline tap water with sulfate of potash and gypsum.

My code for OWN-ROOT roses: PALE LEAVES prefer loamy soil & acidic rain. DARK-GREEN prefer heavy/alkaline clay GLOSSY: partial shade & wet & alkaline minerals. TINY LEAVES prefer loamy & drought-tolerant (species). LARGE LEAVES = vigorous & deep root. THICK LEAVES = heat tolerant.

5-leaflet = modern roses, OK with alkaline tap-water. 7-leaflet or thornless or blue-color = multiflora & cooler sites & loamy & high-rain. 7-leaflet and many prickles = drought-tolerant Centifolia or Rugosa & loamy/sandy & hot & dry.

Over-fertilization: wilting, leaves curl down.
Too acidic: leaves curl up & thinner, and blackspots.
Too alkaline: Pale leaves & top leaves twisted & crinkled (copper def).
Potassium def: zero blooms, balling, thin & weak stems, and blackspots.
Calcium def: less petals, stunt growth & tip die-back
Nitrogen def: small leaves & pale LOWEST leaves
Sulfur def: entire plant is pale & stunt growth

ON DISEASES & DIFFERENCES IN ROOTSTOCKS & pH preference:
http://forums.gardenweb.com/discussions/4167700/blackspot-organic-prevention-and-remedies?n=33
http://forums.gardenweb.com/discussions/4307542/best-soil-and-ph-for-different-roses-and-plants-and-your-goals-and-plans?n=16
SOIL CHEMISTRY AND BUFFERS TO NEUTRALIZE ACID RAIN:
http://forums.gardenweb.com/discussions/4198011/your-plans-for-roses-in-ground-and-pots-soil-prep-and-fertilizing?n=66
http://forums.gardenweb.com/discussions/4114089/mineral-nutrient-deficiency-and-secret-to-health-and-antifungal-trace-e?n=50
http://forums.gardenweb.com/discussions/2133077/why-own-root-roses-are-healthier-than-grafted?n=18

MINERAL DEFICIENCY: http://forums.gardenweb.com/discussions/4034324/questions-on-mineral-nutrient-deficiency-in-pots-and-ground-and-fertilizer?n=65
http://forums.gardenweb.com/discussions/3269110/azomite-red-lava-rock-manure-bone-meal-worm-castings?n=34
TEST YOUR SOIL PH:
http://forums.gardenweb.com/discussions/2132487/cheapest-way-to-test-soil-ph-using-red-cabbage?n=26

FERTILIZING ROSES:
http://forums.gardenweb.com/discussions/3241444/taking-care-of-plants-in-flood-drought-heat-and-cold?n=31
http://forums.gardenweb.com/discussions/2134701/salt-index-of-chemical-fertilizer-and-soluble-for-hot-weather?n=26
ROOTING ROSES:
http://forums.gardenweb.com/discussions/4313593/soil-mix-for-indoor-baggie-rose-rooting-vs-outdoor-rooting-with-rain?n=13
http://forums.gardenweb.com/discussions/4095901/roses-for-hot-and-dry-hot-and-wet-shady-and-dry-shady-and-wet-locations?n=53
WHAT KILL ROSES IN WINTER: http://forums.gardenweb.com/discussions/4329440/keep-roses-alive-through-winter-and-differences-in-roots-rootstocks?n=15
ROSES THAT SURVIVE ZONE 5a:
http://forums.gardenweb.com/discussions/4240705/links-to-hardy-roses-in-cold-zones-and-best-roses-for-hot-and-dry-climate?n=17
FRAGRANCE
https://www.houzz.com/discussions/2795373/most-perfumed-rose#n=25
 
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