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Salvia blight?
"FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? |
Salvia blight?
On 2014-07-23 15:03:18 +0000, FrankB said:
"FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. -- Sacha www.hillhousenursery.com South Devon www.helpforheroes.org.uk |
Salvia blight?
"Sacha" wrote in message ... On 2014-07-23 15:03:18 +0000, FrankB said: "FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. Hi Sacha. I have 2 photos of the problem. https://www.flickr.com/photos/120747...ostream/lightb ox/ https://www.flickr.com/photos/120747...ostream/lightb ox/ As regards watering I rang up a nursery today where a guy who seemed to know about Salvias told me that this problem may arise if they are not watered enough and that I should not let them get dry in the pot. I originally suspected it was a fungal problem, but he didn't think so and I can see nothing on the web that suggests that Salvias are affected by fungal diseases..I've ruled out siun scorch as some of the leaves higher up the plant have started to show symptoms whereas I always water with the nozzle of my can close to the soil surface, so upper leaves don't get splashed. |
Salvia blight?
On 2014-07-24 00:58:12 +0000, FrankB said:
"Sacha" wrote in message ... On 2014-07-23 15:03:18 +0000, FrankB said: "FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. Hi Sacha. I have 2 photos of the problem. https://www.flickr.com/photos/120747...ostream/lightb ox/ https://www.flickr.com/photos/120747...ostream/lightb ox/ As regards watering I rang up a nursery today where a guy who seemed to know about Salvias told me that this problem may arise if they are not watered enough and that I should not let them get dry in the pot. I originally suspected it was a fungal problem, but he didn't think so and I can see nothing on the web that suggests that Salvias are affected by fungal diseases..I've ruled out siun scorch as some of the leaves higher up the plant have started to show symptoms whereas I always water with the nozzle of my can close to the soil surface, so upper leaves don't get splashed. I showed your photo to Ray and he agrees with your nurseryman that, unlike most (!) you've let them get too dry but repeats that you shouldn't over-water and let them drain between waterings. We have a large Salvia leucantha Santa Barbara and a Salvia guaranitica in two separate pots and they get a splash once a day. There's a fine balance between giving them sufficient water and killing them with too much in this hot weather. Our pots are terracotta and very tall sort of Ali Baba shaped things. We can see from the outside roughly where the damp level is. But if you're using plastic pots, as yours seem to be, it would be a good idea to raise them a little to let the water drain freely, just to make sure your watering regime doesn't go too far the other way. -- Sacha www.hillhousenursery.com South Devon www.helpforheroes.org.uk |
Salvia blight?
"Sacha" wrote in message ... On 2014-07-24 00:58:12 +0000, FrankB said: "Sacha" wrote in message ... On 2014-07-23 15:03:18 +0000, FrankB said: "FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. Hi Sacha. I have 2 photos of the problem. https://www.flickr.com/photos/120747...ostream/lightb ox/ https://www.flickr.com/photos/120747...ostream/lightb ox/ As regards watering I rang up a nursery today where a guy who seemed to know about Salvias told me that this problem may arise if they are not watered enough and that I should not let them get dry in the pot. I originally suspected it was a fungal problem, but he didn't think so and I can see nothing on the web that suggests that Salvias are affected by fungal diseases..I've ruled out siun scorch as some of the leaves higher up the plant have started to show symptoms whereas I always water with the nozzle of my can close to the soil surface, so upper leaves don't get splashed. I showed your photo to Ray and he agrees with your nurseryman that, unlike most (!) you've let them get too dry but repeats that you shouldn't over-water and let them drain between waterings. We have a large Salvia leucantha Santa Barbara and a Salvia guaranitica in two separate pots and they get a splash once a day. There's a fine balance between giving them sufficient water and killing them with too much in this hot weather. Our pots are terracotta and very tall sort of Ali Baba shaped things. We can see from the outside roughly where the damp level is. But if you're using plastic pots, as yours seem to be, it would be a good idea to raise them a little to let the water drain freely, just to make sure your watering regime doesn't go too far the other way. Yes, it is in a 2L plastic pot. The pot is resting on potting compost so presumably any excess water will drain away into that. I've picked off all the affected leaves which is about half those on the plant. It continues to make new flower spikes and the vigour of the plant is encouraging. I did give it a tomato feed about 2 weeks ago and it may just be a coincidence but that's when the symptoms first started to appear. By the way I'm getting lots of seed from spent flowers. Do you know if Salvia Patens comes true from seed? |
Salvia blight?
On 2014-07-27 16:38:24 +0000, FrankB said:
"Sacha" wrote in message ... On 2014-07-24 00:58:12 +0000, FrankB said: "Sacha" wrote in message ... On 2014-07-23 15:03:18 +0000, FrankB said: "FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. Hi Sacha. I have 2 photos of the problem. https://www.flickr.com/photos/120747...ostream/lightb ox/ https://www.flickr.com/photos/120747...ostream/lightb ox/ As regards watering I rang up a nursery today where a guy who seemed to know about Salvias told me that this problem may arise if they are not watered enough and that I should not let them get dry in the pot. I originally suspected it was a fungal problem, but he didn't think so and I can see nothing on the web that suggests that Salvias are affected by fungal diseases..I've ruled out siun scorch as some of the leaves higher up the plant have started to show symptoms whereas I always water with the nozzle of my can close to the soil surface, so upper leaves don't get splashed. I showed your photo to Ray and he agrees with your nurseryman that, unlike most (!) you've let them get too dry but repeats that you shouldn't over-water and let them drain between waterings. We have a large Salvia leucantha Santa Barbara and a Salvia guaranitica in two separate pots and they get a splash once a day. There's a fine balance between giving them sufficient water and killing them with too much in this hot weather. Our pots are terracotta and very tall sort of Ali Baba shaped things. We can see from the outside roughly where the damp level is. But if you're using plastic pots, as yours seem to be, it would be a good idea to raise them a little to let the water drain freely, just to make sure your watering regime doesn't go too far the other way. Yes, it is in a 2L plastic pot. The pot is resting on potting compost so presumably any excess water will drain away into that. No, the compost will get wet and be soaked up by the compost in the pot. A lot of people don't agree with putting e.g. gravel or stones in the bottom of a pot for the same reason. It would be better to get some of those little things called 'frogs' on which you can balance a pot, or just raise it on a couple of bricks. Plastic pots don't dry out quite as quickly as terracotta ones, ime. I've picked off all the affected leaves which is about half those on the plant. It continues to make new flower spikes and the vigour of the plant is encouraging. I did give it a tomato feed about 2 weeks ago and it may just be a coincidence but that's when the symptoms first started to appear. By the way I'm getting lots of seed from spent flowers. Do you know if Salvia Patens comes true from seed? It should do if it's the species. Start it off indoors or in a greenhouse. -- Sacha www.hillhousenursery.com South Devon www.helpforheroes.org.uk |
Salvia blight?
On Thursday, 24 July 2014 09:43:29 UTC+1, Sacha wrote:
On 2014-07-24 00:58:12 +0000, FrankB said: "Sacha" wrote in message ... On 2014-07-23 15:03:18 +0000, FrankB said: "FrankB" wrote in message news:... I've been growing a Salvia 'Patens' in a 2L pot and it was doing fine until the last 2 weeks some worrying dark brown spots and blotches have started to appear on the leaves, young and old. Any ideas? Are you keeping it pretty dry and watering only when necessary? Let it drain between watering, too and don't let the leaves get splashed with water through which sunlight can burn them. Hi Sacha. I have 2 photos of the problem. https://www.flickr.com/photos/120747...ostream/lightb ox/ https://www.flickr.com/photos/120747...ostream/lightb ox/ As regards watering I rang up a nursery today where a guy who seemed to know about Salvias told me that this problem may arise if they are not watered enough and that I should not let them get dry in the pot. I originally suspected it was a fungal problem, but he didn't think so and I can see nothing on the web that suggests that Salvias are affected by fungal diseases..I've ruled out siun scorch as some of the leaves higher up the plant have started to show symptoms whereas I always water with the nozzle of my can close to the soil surface, so upper leaves don't get splashed.. I showed your photo to Ray and he agrees with your nurseryman that, unlike most (!) you've let them get too dry but repeats that you shouldn't over-water and let them drain between waterings. We have a large Salvia leucantha Santa Barbara and a Salvia guaranitica in two separate pots and they get a splash once a day. There's a fine balance between giving them sufficient water and killing them with too much in this hot weather. Our pots are terracotta and very tall sort of Ali Baba shaped things. We can see from the outside roughly where the damp level is. But if you're using plastic pots, as yours seem to be, it would be a good idea to raise them a little to let the water drain freely, just to make sure your watering regime doesn't go too far the other way. -- Sacha www.hillhousenursery.com South Devon www.helpforheroes.org.uk My Salvia gauranitica - bought from you ten years or so ago Sacha, is in the open ground (east coast sand), full sun and gets no watering and doesn't seem to mind at all. I have never brought it in over winter and though it looked very poorly during that wet summer we had, it survived five inches of snow for two weeks and then the following winter minus five for a couple of weeks. Tougher than it looks if given drainage I think. Karen |
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