WHY DOES MY SEEDLINGS DIE?

I sowed my first seed when I was 9 years. Since then I have surely sown something every year. I should be really good at doing this. Nevertheless died all those healthy seedlings of  Nicotiania alata in a matter of hours last week.

Nicotiania alata is a plant that is well suited for the Texan climate as well as it is an excellent summer flower in Scandinavia. It is fragrant, can withstand both much water and some dry spells. It is loved by butterflies and bees and here in Texas, you can plant it in both sun and shade.

I get really upset every time sprouts withers in this way.  I have ordered the seeds and paid for those, maybe it is a type that is not so easy to obtain? I’ve spent time and effort to sow and water them and admired the small, but healthy seedlings. And then they suddenly die en masse. I really take it very personally.

Why do sprouts wither?

•  Too much water.
•  Too little water.
•  Too little light.
•  Too much light so they are scorched. (I had placed the seedlings out in the sun, and underestimated the strong Texas sun)
•  Draft from windows and doors.
•  Too hot and too little light so the seedlings are long, pale and lanky.
•  Too cold so they rot and die.
•  The soil you have used has diseases and fungi who infect the seedlings.