I have had this plant since 2015 and every year it grows and looks healthy but has never flowered. I put salt marsh hay on all my perennials for the winter since I live in southern NH so the plant does come back. It is in a sunny location. I compost it every spring and put a 10 10 10 fertilizer. Please help- it is one of my favorite flowers- I love blue flowers. Thank you.
With the compost and fertilizer you may have too much nitrogen in your soil; excess nitrogen will give you a lush green plant but little or no flowers.
A soil test can give you an accurate report on your soil; but you can also try giving your plant a boost of phosphorous. Bone Meal is a good way to do this.
https://www.gardeningknowhow.com/ornamental/flowers/speedwell/speedwell-in-the-garden.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/too-much-nitrogen-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm
problem? the plant is potted in a container, I water it 3-4 times a week once i see the soil drying up. the leaves on the top are green still but the bottom ones are brown and withering. could it be too much water? I also deadheaded some fo the flowers which had turned brown.
I do see mild signs of infection, but the flower fading may be natural. Trim off the flowering heads and any infected growth. You may want to treat with a fungicide. Division will be necessary each year, or at least every two years.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/ornamental/flowers/speedwell/speedwell-in-the-garden.htm
I thought it maybe something lavender but I think I'm wrong.