Thank you for asking such a nice question. Below mentioned two links may help you.

Nuclear Extraction from Arabidopsis thaliana

https://bio-protocol.org/e306

Arabidopsis thaliana nuclei purification protocol

https://www.germainhugo.com/protocols/a-thaliana-nuclei-purification/

Thank you

Yes, the nuclear extraction method available in bio protocol is a good one as suggested by Mohammod Hussain.

https://bio-protocol.org/e306

We usually use this method

Liechtenstein C, Draper J (1985) Genetic engineering of plants. In:

Glover DM (ed) DNA cloning, vol 2. IRL Press, Oxford,

pp 67–120