Beginner Gardening: Please Help Identify this problem, 0 by TheBradshawBunch

TheBradshawBunch wrote:
Thank you for your response.
I wondered if it could be cold damage too. But its been a few weeks since the last frost date so I was thinking it couldn't be that. But with this weird weather, who knows!

This particular plant is a Rudbeckia "Indian Summer". It is situated mostly in full sun (meaning it gets morning shade and afternoon sun after 11 am) I thought it would be bigger but it seems stunted. I Live in zone 5b. My neighbor grew these last year. They were absolutely beautiful. Her plants were a beautiful bright green with those wonderful yellow flowers. I fertilized all my flowering plants this morning with a fertilizer that has 5-10-10 combo just in case it was a nutrient deficiency. Some of my petunias are doing this as well. And also a couple of my tomato plants. My tomato plants are in a Square Foot Garden soil that is not supposed to need fertilizer so its a mystery to me.