What is the best way to keep baby tears growing well? What's happening if it's losing its leaves?
High humidity is key to successful Baby's Tears plants.
Lack of humidity is the likely cause of the decline, but also make sure the roots are not soggy.
https://www.gardeningknowhow.com/houseplants/babys-tear/babys-tear-houseplant.htm
I need to find a short, year long, perennial, blue flower. I don't know if such a thing exists, but if so, I need to know a name. P.S. It is supposed to look like water, without being real water, so if there was a plant like baby's tears, but it was blue, it would be perfect. Thank you.
Blue Star Creeper and Periwinkle are two options.
https://www.gardeningknowhow.com/lawn-care/lawn-substitutes/blue-star-creeper-lawn/blue-star-creeper-plant.htm
https://www.gardeningknowhow.com/ornamental/groundcover/periwinkle/growing-periwinkle.htm
how do you start baby tears from seed?
Their germination from seed is similar to other small surface seeds. Scatter them on the surface, and keep them warm and moist, but not soaking wet.
This article will help you to care for them once they germinate:
https://www.gardeningknowhow.com/houseplants/babys-tear/babys-tear-houseplant.htm
Can you please advise what this is growing in my lawn (and taking over!) and how I can get rid of it. Tried numerous weed killers - nothing works
It is very hard to say, since it resembles many plants, but my best guess would be Soleirolia soleirolii.
Here is an article for more information:
https://www.gardeningknowhow.com/houseplants/coral-bead-plant/care-of-coral-bead-plant.htm