Ask a Question forum: Areas of new landscape dying off

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Name: Amber
Greenwell Springs, LA (Zone 8b)
amberlynn5978
Sep 25, 2017 9:31 AM CST
We had our landscape completely renovated around June 22 of this year. Everything except the trees were pulled and replaced with all new plants including soil mix, fertilizer & mulch by a professional company.

There are two separate bed areas and I'd say both beds receive 8+ hours of full sun. In the smaller bed a few Agapanthus and Azalea bushes that are dying off (one Agapanthus died almost immediately after being planted). There are other plants surrounding these that seem to be thriving without a problem. See photo below-- yellow starred plants are dying, red hearts are thriving. There's a second photo that is clearer from a top angle.

In the larger bed, there's a section of about 6-7 Agapanthus and 2 of those are dying off. Oddly one that is down to maybe 5 leaves of foliage just finished a bloom. Everything else in this bed has no problem that I can see.

When the landscape was redone, we weren't getting much rain so I watered daily until the rain started to keep the watering sufficient. I cut back to twice a week w/ the sprinkler system because I didn't know if they were getting too much & that was killing them, but our summer heat & humidity can be brutal. There aren't any pests I can see.

Can anyone give me clues as to why this is only happening to some plants while the same plant next to them isn't? Or any ideas on how to fix this?

I don't want to keep shoving plants in places that will just kill them without fixing the problem. This was quite an expensive renovation for some plants to die within the first few months. (Also, no warranty at this point on the plants)

Thumb of 2017-09-25/amberlynn5978/377c0b


Thumb of 2017-09-25/amberlynn5978/456ae0

Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Sep 25, 2017 10:17 AM CST
Sunburn (if potted plants had been kept in shadier areas of the nursery)? Transplant shock?
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
Name: Celia
West Valley City, Utah (Zone 7a)
Pour vivre parmi les fleurs
Irises Garden Photography I was one of the first 300 contributors to the plant database! Celebrating Gardening: 2015 Butterflies Birds
Cat Lover Enjoys or suffers cold winters Hummingbirder Plant Identifier
Image
Zencat
Sep 25, 2017 10:23 AM CST
Transplant shock and the heat would be my guess, too. Azaleas like acid soil. What's the ph there?
Name: Amber
Greenwell Springs, LA (Zone 8b)
amberlynn5978
Sep 25, 2017 10:49 AM CST
Zencat said:Transplant shock and the heat would be my guess, too. Azaleas like acid soil. What's the ph there?


I thought it was transplant shock when the first one or two agapanthus started dying because the first death was rapid. The rest of these seem to be a slower yellowing of the leaves. I have several neighbors with agapanthus and none of them appear to be dying off the way mine are.

Not sure of the pH as I haven't tested. There are 3 or 4 azaleas not pictured -- to the left of the ones dying -- that are fine as well as the ones in the larger landscape area.

I almost wonder if there's a remnant of what was there before and if that is affecting soil quality in some way. I had a type of heliconia planted that was mainly dead but started to spread about 4 inches away from the original planting before the landscapers came in. Or I'm reaching for answers that don't exist because I know zero about plants! Shrug!
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
Sep 25, 2017 11:01 AM CST
I think w these just being planted this summer, they don't have the root system/establishment they need to thrive. Some dieback is probably expected.
Also I have heard that dark colored mulches are dyed w a chemical from walnuts and can prevent some plants from growing well, I have no idea if that is true though Shrug!
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Sep 25, 2017 11:08 AM CST
I never thought to ask if the adjacent lawn is being chemically treated for weeds, etc.
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
Name: Amber
Greenwell Springs, LA (Zone 8b)
amberlynn5978
Sep 25, 2017 11:19 AM CST
Frillylily said:I think w these just being planted this summer, they don't have the root system/establishment they need to thrive. Some dieback is probably expected.
Also I have heard that dark colored mulches are dyed w a chemical from walnuts and can prevent some plants from growing well, I have no idea if that is true though Shrug!


I was a bit concerned about when they were planted because of the heat. It was the quickest I could get a reputable company out and it needed to be done badly.

I’ll have to look into the mulch thing but I did have black mulch for 4 years prior.
Name: Amber
Greenwell Springs, LA (Zone 8b)
amberlynn5978
Sep 25, 2017 11:23 AM CST
Shadegardener said:I never thought to ask if the adjacent lawn is being chemically treated for weeds, etc.


Nothing on the lawn in at least 18 months. We did flood in August 2016. My previous plants (mainly azaleas and camellias) didn’t suffer from that though. The flood actually made the majority of my lawn weeds not sprout up this past spring which was kind of amazing seeing the weeds in the non-flooded yards!
[Last edited by amberlynn5978 - Sep 25, 2017 12:09 PM (+)]
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