Avatar for dalien14
May 27, 2020 10:55 AM CST
Philadelphia, PA (Zone 7a)
I got 2 forsythia plants last spring. One has grown quite a bit and looks reasonably healthy, the other one is pretty stunted and portions look dry/dead. Both had flowers this year and continue to put out new leaves. The healthier of the 2 also has some areas that don't looks so good. I am pretty confident they are getting enough water.

Twig blight? Something else? Any ideas?




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Last edited by dalien14 May 27, 2020 11:05 AM Icon for preview
Avatar for luis_pr
May 27, 2020 12:23 PM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: New Hampshire Hydrangeas
Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
I could not clearly tell if the ends show galls or if they brown parts are just dead leaves or dead flowers.
so I am putting a link below with related info. The blight usually occurs closer to the bottom of the plant so maybe it also had some parts zapped by late frosts/freezes around May 9th (winter damage).

https://extension.psu.edu/fors...
Avatar for dalien14
May 27, 2020 12:49 PM CST
Philadelphia, PA (Zone 7a)
Just went and took another look... I do not see anything that looks like galls, I think all the "lumpy" areas are dead buds/flowers. I also split a couple of the red branches and didn't see anything that looks like a blight (just a little light white fuzz). Frost damage seems possible.

I do still wonder why one of them is so much happier than the other (4' apart). Maybe slightly different soil conditions...?

seems like next step would be to prune off all the dry dead areas and see what happens now that frost danger has passed. Any other ideas out there?
Image
May 27, 2020 1:31 PM CST
Name: Lyn
Weaverville, California (Zone 8a)
Celebrating Gardening: 2015 Garden Sages Garden Ideas: Level 1
Forsythias bloom on "old wood", so you prune them after they have finished flowering. The plant will put up new growth after it has been pruned, which it will consider to be "old" growth next season.

Go ahead and prune them ... Smiling
I'd rather weed than dust ... the weeds stay gone longer.
Avatar for luis_pr
May 27, 2020 4:16 PM CST
Name: Luis
Hurst, TX, U.S.A. (Zone 8a)
Azaleas Salvias Roses Plumerias Region: New Hampshire Hydrangeas
Hibiscus Region: Georgia Region: Florida Dog Lover Region: Texas
It is surprisingly common to see frost hit one plant and skip the one beside it. It has happened to my hydrangeas when they leaf out too early.

Hope the forsythia looks better by the Fall. Stop all fertilizers by Aug 1st.
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