Cover - shares	3 Months Ended
	Oct. 31, 2021	Dec. 09, 2021
Cover [Abstract]
Entity Registrant Name	GREEN HYGIENICS HOLDINGS INC.
Entity Central Index Key	0001443388
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Document Period End Date	Oct. 31, 2021
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2022
Entity Common Stock Shares Outstanding		44,482,138
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity File Number	000-54338
Entity Incorporation State Country Code	NV
Entity Tax Identification Number	26-2801338
Entity Address Address Line 1	13795 Blaisdell Place
Entity Address Address Line 2	Suite 202
Entity Address City Or Town	Poway
Entity Address State Or Province	CA
Entity Address Postal Zip Code	92064
City Area Code	1-855
Local Phone Number	802-0299