1
Cut back perennial plant stalks to the ground in fall after harvest.
2
This is a hardy, perennial plant, cultivated almost exclusively for its leaf-stalks.
3
It is a hardy, perennial plant, with an irregular, branching, brownish root.
4
But Oskars knows how to stop the perennial plant growing back.
5
This is a biennial with some tendency toward the perennial plant.
6
It's a tufted perennial plant which can grow up to 1 metre high.
7
A hardy, perennial plant, said to be a native of Siberia.
8
This is a perennial plant, from the south of Europe.
9
The Cive is a hardy, bulbous-rooted, perennial plant, indigenous to France and Great Britain.
10
A hardy, perennial plant, from the south of Europe.
11
A perennial plant, with a rigid, angular, branching stem a foot and a half high.
12
A perennial plant, from the south of Europe.
13
This is a half-hardy, perennial plant, common to rocky localities on the seacoast of Great Britain.
14
The recommended application rate for a perennial plant in a three-gallon plot is a full 300 milligrams.
15
The Sea-beet is a hardy, perennial plant.
16
Lovage is a hardy, perennial plant, with a hollow, channelled, branching stem six or seven feet high.
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