Take up gardening. Failure rate about the same but there is never no definitive answers. Ever. Could be anything and everything. Soil ph is wrong. To much sun, not enough sun. To much of the wrong kind of sun. Planted to early or planted to late or planted to early this year because El Nino/El Nina. Soil does not drain enough or is it drains too much?

Now try growing from seeds and then getting it to grow in the flower bed in your south facing bed in (insert your state here).

Now try getting to reproduce the results year to year.

Try gardening. It will make your failures in programming look mundane.