I planted this 4 weeks ago and now I see that the plan developed a couple of these spots as you can see in the picture.enter image description here

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  • When you say you 'planted' this 4 weeks ago, it appears to be still in a pot ,, and it looks like the pot has been pushed into the ground - is that correct? Is there a label with the plant that gives a varietal name? What part of the world are you in? – Bamboo Nov 20 '18 at 9:50
  • Lol. Nope I just cut the rim as I had placed copper tape on the pot to deter snails when I bought this plant and wanted to keep that barrier. – Joseph Wit Nov 20 '18 at 11:58
  • I also dug down like two and a half feet by two and a half feet and amended the soil with 50/50 of native and Dr, Earth. Don't really think I have to do that but I figured adding better soil to good is always better....? – Joseph Wit Nov 20 '18 at 12:02
  • I'm in South NJ and forgot the name of this plant😕 – Joseph Wit Nov 20 '18 at 12:44
  • So it's confirmed it's a mountain laurel.... So now what's the verdict, regarding these spots – Joseph Wit Nov 21 '18 at 19:11

After I originally mistook this plant for Pieris, you've now confirmed its Kalmia latifolia, common name Sheep Laurel or Mountain Laurel. The new leaves appear to be pinkish red in colour, so it might be the variety Kalmia 'Olympic Fire'. Like Pieris, they require acidic soil, so hopefully, you've been able to provide that. The plant looks pretty healthy other than the leaf spot, which is most likely fungal in origin, though I'm not too happy about the plant pot rim left around the top. When planting into the ground, it's important that the plant is placed at the same level in the soil as it was in the pot - the rim you've left means the top part is isolated from the surrounding soil rather than being buried in it, and that might compromise its health. These plants are not particularly susceptible to slug and snail damage anyway, so the copper tape is likely unnecessary, so I'd recommend you remove the top of the pot and reposition the plant if necessary.

Kalmia does suffer from a fungal leaf spot which is specific to them (Cercospora kalmiae) and that is most likely what you're seeing here. It is important the plant is not watered using overhead irrigation, but rather the water is applied direct to the soil around the plant, avoiding the leaves - wet leaves encourages this fungal infection. I'm afraid you will need to use a suitable fungicide, if you have any available where you are https://extension.psu.edu/mountain-laurel-diseases

  • The plant was removed from the pot before I replanted and the rim is just laying there on top of the soil. I made sure it didn't compromise the replanting process. if you think that this will make a difference regarding protecting the plans from snails or that snails don't harm this plant then I'll remove it – Joseph Wit Nov 22 '18 at 13:39
  • If you planted it properly first, then just placed the rim on the top of the soil, it won't cause any problems. – Bamboo Nov 22 '18 at 16:17
  • thank you so much for updating your post and I will try to get a fungicide and make sure I don't get water on the leaves – Joseph Wit Nov 22 '18 at 18:19
  • Any recommendations on a fungicide – Joseph Wit Dec 2 '18 at 4:31
  • Not really, other than trying copper sprays if you can get them there - I'm in the UK and there are no effective fungicides available for amateur use, though there may be in the USA. Some information on natural measures here planetnatural.com/pest-problem-solver/plant-disease/… – Bamboo Dec 2 '18 at 10:48

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