So in my yard, I have a patch of clovers (standard white clovers) that give a lot of four leaves and a few five leaves. is there any way for me to grow them inside and mutate them to always be four leaves or higher? I want to press and sell them but it could always be faster. I'm not really all that good at growing plants so if possible a step by step guide would be amazing.
Clover as a houseplant - good luck with that, you'll need it, I believe.– EcnerwalNov 6, 2022 at 14:58
Rather than trying to force an outdoor plant into being a houseplant (not always the easiest thing to do), you might want to consider a tropical-ish plant that can be grown as a houseplant: plants in the genus Oxalis.
Lucky Clover (Oxalis tetraphylla, also found as Oxalis deppei) could work for you, if you don't mind that the leaves have a bit of reddish-purple on them. The leaves are, however, reliably "four-leaved", so no mutations needed. These would definitely be easier to grow in the ground if you live in US Zone 7 and warmer, but can do well indoors if treated properly.
This page gives more details, as well as cultural information. The key points are that the plants need at least partial direct sun when indoors and free-draining potting soil. Adding a little coconut coir and/or perlite to commercial soil would be a good idea. You should use a timed-release fertilizer like Osmocote (US) three times a year. During the winter, keep the plant away from your home's heat source (radiator, heating duct).
More cultural information is here.