How to Grow Plants

This guide explains what helps a plant grow and how to check likely causes when growth goes wrong. Use each crop page for the plant's exact needs.

Plants need the right light

Light gives a plant energy to grow. Fruiting plants often need more direct sun than leafy crops. Watch the space before planting and match the crop to the light you have. A pale or stretched plant may need more light, but leaf color alone does not prove the cause.

Roots need both water and air

Roots take up water, but they also need air. Soil or potting mix should hold some moisture and let extra water drain. Check the soil before watering. Dry soil and wet soil can both lead to wilt, so the soil gives you a better clue than the leaves alone.

Roots need room

A plant crowded into a small pot or tight spacing may struggle to reach water, light, and nutrients. Choose a container and spacing for the mature plant, not the seedling you see today. Bush or compact varieties can be easier in small spaces.

Temperature changes what a plant can do

Each crop has a preferred season. Lettuce and basil do not want the same weather. Cold soil can slow a warm-season plant, while heat can stress a cool-season crop. Check recent weather before assuming that water or fertilizer is the problem.

Nutrients help, but more is not always better

Plants need nutrients, but a weak plant does not always need fertilizer. Test garden soil before adding nutrients. In containers, use a suitable potting mix and follow crop or product guidance. Too much fertilizer cannot fix poor light, soggy roots, cold weather, or a pot that is too small.

Check an unhappy plant in this order

1. Feel the soil. Is it dry, damp, or soggy?
2. Check drainage. Can extra water leave the bed or pot?
3. Look at the light. Has shade increased as nearby plants grew?
4. Think about recent heat, cold, wind, or frost.
5. Check whether roots and leaves have enough room.
6. Look under leaves and along stems for pests or damage.
7. Check soil test results or feeding guidance last.

Change one thing at a time when you can. If you add water, fertilizer, shade, and pest treatment together, you may never learn what helped.

Use the crop as your guide

The basics are shared, but the useful answer is crop-specific. Check the crop page for sunlight, root depth, spacing, season, soil, water, support, and visible signs of harvest.

• 

  Easy

  Basil

  A tender summer herb that grows fast, hates cold nights, and gives more the more often you cut it.

  • Full sun
  • 50 to 75 days
  • 2 gal pot or bigger
  • 6 to 12 in apart
• 

  Takes some care

  Bell Pepper

  A sweet, warm-season pepper that can be picked green or left to ripen to its final color.

  • Full sun
  • 70 to 85 days
  • 5 gal pot or bigger
  • 18 in apart
• 

  For a confident grower

  Blueberry

  A long-lived fruit shrub that needs much more acidic soil than most garden crops.

  • Full sun
  • 36 to 48 in apart
• 

  Takes some care

  Broccoli

  A cool-season cabbage-family crop grown for tight green flower buds.

  • Full sun
  • 8 to 10 in apart
• 

  Takes some care

  Cabbage

  A cool-season leaf crop that wraps its inner leaves into a firm head.

  • Full sun
  • 15 to 18 in apart
• 

  Takes some care

  Carrot

  A root crop that asks for little except loose, stone free ground and patience while it germinates.

  • Full sun
  • 70 to 80 days
  • 2 to 4 in apart

Sources

• Growing Vegetables In Containers (University of New Hampshire Extension)
• Planting the vegetable garden (University of Minnesota Extension)