Healthy Modern Roses For The Mid-Atlantic?
oath5
16 years ago
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geo_7a
16 years agoRelated Discussions
Anybody in the Mid-Atlantic region grow 'Etoile de Lyon'
Comments (4)I had EdL for two years. I lost it, but it was my fault. Actually it was constructtion next door fault. Poor EdL was leveled to the ground and never recovered. So my experience is limited. Similar to other Teas in my garden it was loosing approx 70% leaves to BS, but it was not completely naked. Problem for me was that due to the leaf loss (I think)it was growing very slow. I observe this with other Teas too. When I sprayed them in the past they all grew like crazy, when I stopped spraying several years ago, they really started shrinking in size instead of growing and the small Teas planted in spring after I stopped spraying have hard time to survive winters. I have approx dozen Teas and they are more or less similar in resistance, with Lady Hillingdon and Mme Berkeley being the least resistant of the whole group I grow now. Safrano is the best in resistance, but still more than 50% leaf loss. Georgetown Tea, Mrs B R Cant, Duchesse de Brabant, and some others are in the middle. In the past I tried Cochet Family (3 different ones) and they were the worst for balling and resistance here, much worse than Mme Berkeley and LH. IConnie's place is significantly to the South from me, and I think this makes a differnce to Teas. Looks like they like the warmer the better. Reports from warmer places are always positive on BS resistance. Olga...See MoreMid-Atlantic disease conditions
Comments (6)Mid-atlantic area usually have a very high BS pressure. It is humid and temperatures are just right for BS spores germination on the surface of wet leaves. By my observations and talking with rose friends in this area, DC actually by some reason is better then MD, north VA or PA in terms of BS pressure. It is close to south VA in this aspect. Probably it is because DC being a city is at least half a zone (probably more) warmer then MD. BS spores will not germinate when temps are higher then certain point. I don't remember exactly the number, but somewhere around 75-78 deg, if I remember correctly. Leaves are almost always wet at night, so regions that have high humidity and 65-75 deg at night have the highest BS pressure. This is the reason why warmer places (TX, LA, etc)have worst time with BS in spring and fall. Southern Summers are just to hot for BS spores. This spring we have a lot of rain and leaves stay wet almost always day and night, temps are also just right. Olga...See MoreDA Rose varieties, Mid-Atlantic, Some Shade
Comments (7)When did you check for sun exposure? Generally with a semi-northern exposure, the most sun is in June-July and the least in fall. The break point for decent (not optimum) performance for most roses is around 5 hours of direct sun, or 4 hours for shade-tolerant varieties. Open sky or a reflective building to the north can help a bit. So you need to give careful thought to whether this site is suitable for roses at all. Depending on the layout, you might get flushes of bloom in May and July with little or none later on. For soil preparation, it would be good to get a full soil test through the county agent ( ag extension or cooperative extension office). This is a simple process and inexpensive in most states. However, weathered clay soils east of the mountains are pretty consistently low in everything. In typical soils of this kind, you would adjust pH to around 6.2 using dolomite limestone and add 2 oz of triple super phosphate per square yard. But I can't confidently recommend any chemical amendments absent a soil test. I'd recommend that you not dig deep holes. Modern horticultural practice calls for amending the whole planting area or a wide area uniformly to a depth of 10-12 inches. Digging in 3" of any decayed organic matter will help plants get started, and maintaining a deep organic mulch will replenish organic material continuously from the top. Do not dig or step on clay soils when they are wet--this causes permanent damage to the soil texture. Do soil prep when the soil is semi-dry, not in late winter or spring. As to selecting varieties, you should make a firm decision in advance whether you are willing to spray the roses every two weeks or so with fungicide. If not, your choice of varieties is severely limited; for example, 'Golden Celebration' would defoliate repeatedly. A nice yellow rose that is resistant to blackspot and somewhat shade tolerant is 'Carefree Sunshine.' It can be kept to 4'. However, it has single flowers (few petals)....See MoreDavid Austin varieties/Mid Atlantic/Advice Wanted
Comments (7)With spray program most Austins are very happy in Maryland. I think they really love our soil, summer heat with decent rainfall (this usmmer is exception) and winter chill. W/o spray this is another story. As Lori mentioned, they all will have BS and it all depends on your tolerance. I love Hritage, but I didn't spray and it has probably less than 10% of its leaves and it is not because of fall. It looks like it form mid July. Mayflower was OK for a year and than developed so much BS, you would not believe it. I gave it 4 years hoping it was just an unhappy year, but it lost it resistance forever. It is not in my garden anymore. Of all Austins I ever tried, the most resistant were Bow Bells (didn't see it offered that often now), The Shropshire Lad, Alexander Rose, Belle Storey. None of them is really resistant, just better in resistance than the others for this area in my experience. I didn't try Teasing Georgia or Generous Gardener, I would try them if I had sapce. Olga. Olga...See Moremad_gallica (z5 Eastern NY)
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