Are these words related?

Words about Plants

The words in the first row of this table are all marked with an asterisk (*).
This means that they are believed to be the P.I.E. roots that later became words in other languages, as shown in the other rows of the table.

Follow the gold links below to learn more about these words and the languages and cultures that they come from.

P.I.E.	derwo-/dru	*bhereg	*bhago-	*grno-	------
Modern English	tree	birch	beech	corn	garden
OLD ENGLISH	treow	beorc	bece	corn	ort geard
GERMAN	------	Birke	Buche	Korn 'rye'	Garten
LATIN	------	farnus 'ash'	fagus	granum 'a grain'	hortus
GREEK	doru 'beam,shaft,spear'	------	phagos 'oak'	geron 'old man'	kepos
RUSSIAN	derevo	bereza	------	zerno	ogorod
SANSKRIT	daru- 'wood'	bhurja-	------	jirna-	------
SPANISH	madera 'wood'	------	------	grano	jardin
FRENCH	------	------	------	------	jardine