Imperial Seedlings Guide
Young vegetable transplants freshly planted in raised wooden garden beds on a spring morning

Seeds and seedlings, explained

Grow it from seed

An independent guide for US gardeners: when to start seeds indoors, how to raise stocky seedlings under lights, when and how to move them outside, crop-by-crop notes, fixes for seedling problems, and planning by hardiness zone and frost date.

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Starting seeds indoors

Starting vegetable and herb seeds indoors: timing by your last frost, mix and containers, grow lights, germination temperature, watering, feeding and potting up.

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How to Start Seeds Indoors, Step by Step

A practical, step-by-step guide to starting vegetable and herb seeds indoors: timing, containers, mix, warmth, light, watering, potting up and hardening off.

9 min read

Hardening off and transplanting

Moving seedlings outside without setbacks: hardening off, planting day, buying healthy transplants, direct sowing versus transplants, and protection from cold.

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Vegetable and herb seedlings by crop

Crop by crop: tomatoes, peppers and eggplant, broccoli and cabbage, cucumbers and squash, lettuce and greens, and herbs - when to sow, how to raise them, when to plant out.

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Seedling problems and fixes

What is wrong with your seedlings and how to fix it: damping-off, leggy seedlings, seeds that will not sprout, and fungus gnats and other pests.

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Planning by hardiness zone and frost date

What your USDA hardiness zone does and does not tell you, how to read frost dates, building a seed starting calendar, and planning fall transplants.

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Industrial hemp farming basics

Industrial hemp in the US: the legal frame from the 2018 farm bill to the 2025 change, licensing and THC testing, transplants, spacing, irrigation and harvest timing.

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