What can beginners grow in a greenhouse?

Beginners should start with easy crops like lettuce, spinach, herbs, and radishes. These are forgiving and grow quickly. As you gain experience, try tomatoes, peppers, and cucumbers. Cool-season crops are generally easier than warm-season ones.

What size greenhouse do I need as a beginner?

A 6x8 or 8x10 foot greenhouse is ideal for beginners. It's large enough to grow a variety of crops but small enough to manage easily. Smaller greenhouses heat up and cool down quickly, making temperature control more challenging.

When should I start seeds in a greenhouse?

Start warm-season crops (tomatoes, peppers) 6-8 weeks before your last frost date. Cool-season crops can be started earlier. Use your USDA hardiness zone as a guide, but monitor actual temperatures in your greenhouse.

How do I control temperature in a beginner greenhouse?

Use automatic vent openers for cooling, shade cloth in summer, and a small heater for winter. Monitor with a min/max thermometer. Thermal mass like water barrels helps stabilize temperatures. Ventilation is crucial to prevent overheating.

Can I grow vegetables year-round in a greenhouse?

Yes, but it depends on your climate and heating costs. Cool-season crops like lettuce, spinach, and herbs can grow through winter in most zones. Warm-season crops need supplemental heat in cold climates, which can be expensive.

What are common beginner greenhouse mistakes?

Common mistakes include poor ventilation, overwatering, overcrowding plants, and not monitoring temperature. Start small, focus on a few crops, and learn proper watering techniques. Good air circulation prevents disease problems.

Greenhouse Gardening for Beginners

Simple planner, seasonal crop ideas, and what you can grow in a greenhouse.

Back to Guides & Growing

Quick Planner

Customize your greenhouse setup

USDA Zone

Greenhouse Size

Primary Goal

🌱

Start Transplants

Get a head start on the season

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Extend Season

Grow longer into fall/winter

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Year-Round Greens

Fresh greens all year long

What You Can Grow

Cool vs warm season crops

Cool Season

lettuce

spinach

kale

arugula

peas

broccoli

herbs

Warm Season

tomato

pepper

cucumber

basil

eggplant

Seasonal Matrix

General guidance by goal (adjust by zone & light)

Month	Starts	Extend	Year-Round
Jan	Onion, celery, herbs	Spinach, kale	Microgreens
Feb	Tomato, pepper (heat mat)	Lettuce succession	Microgreens
Mar	Cucumber, basil	Radish, bok choy	Microgreens
Apr	Eggplant, flowers	Peas, cool greens	Herbs, lettuce
May	Transplant out	Last cool crops	Succession planting
Jun-Aug	Summer break	Summer break	Heat-tolerant greens
Sep	Fall transplants	Fall greens start	Resume full growing
Oct	Overwintering onions	Spinach, arugula	Cool season crops
Nov	Cold frames	Harvest & succession	Kale, chard
Dec	Plan next year	Harvest storage crops	Microgreens, herbs

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