key growing information

Growing Perilla (Shiso) From Seed

How to grow shiso (perilla) from seed: freezing seed for germination, direct sowing after frost, light for germination, spacing, soil and harvest.

By Hensley’s Seed Co. September 3, 2026

Shiso - Key Growing Information

Red and green shiso; seed germinates best following period of cold exposure; prefers well-drained but moist soil and full to partial sun.

DAYS TO GERMINATION:

Usually 7–21 days.

SOWING:

Sowing in place is recommended. For the best germination, keep the seed in the freezer until sowing. Plant in spring after the last frost, 1–2 seeds per inch in rows 18" apart, sowing shallow or covering only lightly since it needs light to sprout. Plants can grow fairly thick, or thin them to 6–12".

LIGHT PREFERENCE:

Full sun.

SOIL REQUIREMENTS:

Does well in medium to rich sandy soil.

PLANT HEIGHT:

Grows about 18–30" tall.

PLANT SPACING:

Space plants 6–12" apart.

HARDINESS ZONES:

Grown as an annual.

HARVEST:

Pick leaves for fresh use once plants are established.

SCIENTIFIC NAME:

Perilla frutescens