Second Sun Garden Supply

Pot Selection Guide

Pot Selection Guide

We knew that title would get your attention!  A common question from growers is, "What size/style pot or inserts should I use to start this seed?"  This guide will attempt to help you make a decision about what inserts and pot sizes to use for your seeds, transplants, or house plants.  Here are a few general points to keep in mind first:

  • Square pots make more efficient use of space than round pots.

  • Inserts can be easier to use than plug sheets/trays since inserts break apart.

  • For plug sheets/trays, seedlings should remain in the plug until the roots are large enough that the plant can be removed with soil intact.  Plan the plug size accordingly so when the plants are this size, the leaves don't shade neighboring cells. 

  • Deep rooted plants should use deep pots, deep/jumbo inserts or deep plug trays so that the tap root can grow down instead of wrapping around in the container.

  • Some crops are best direct seeded.

  • Use a high quality potting mix for the best results.  The stuff you can buy at the big box stores doesn't count.

      We have listed the crop on the left side and the corresponding recommended containers on the right side. 

       

      The recommended containers could be used to germinate the seeds and raise the seedlings until the point that they're ready for transplant into their final growing spot.  This results in fewer transplants, which maintains plant vigor for faster growing transplants.   Where Jiffy Pellets are mentioned, they should be transplanted whole directly into the ground when ready. 

       

      Some plants with larger recommended containers sizes may benefit from being started in smaller cells and moved up into larger containers.  For example, you might start peppers in a 512 cell plug tray because they take up less space when the weather is colder so you can fit them under one grow light inside the house.  In 3 weeks, they're big enough to move to larger to containers, and at that point, the weather has warmed, so it costs less to heat your whole greenhouse.  In some areas (Florida), the temperature dynamic is opposite, but the same idea applies.

       

      Cuttings are best started in plug sheets or trays, and moved into larger containers. 

       

      These are general recommendations, and your preferences may vary.  Certain cultivars of the same species have different growth habits and requirements, which may not be accurately reflected here. 

       

       

      Crop/Plant Recommended Containers
      Vegetables
      Artichoke

      Transplant from 98 cell plug sheets/trays

      Transplant from 804, 1206 inserts

      Asparagus (Seed) Transplant from 200 deep cell plug trays
      Beans

      Direct seed preferred.

      Transplant from 50 cell plug sheets/trays

      Transplant from Deep Jumbo 806

      Transplant from 42mm Jiffy Pellets

      Beets

      Direct seed preferred.

      Transplant from 98, 128, 162 plug sheets/trays

      Transplant from 30mm Jiffy Pellets

      Broccoli

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Brussels Sprouts

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Cabbage

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Carrots Direct seed into soil
      Cauliflower

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Celery/Celeriac Transplant from 98, 128, 162, 200 cell plug sheets/trays
      Collards

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Corn

      Direct seed preferred

      Transplant from 98 cell plug trays

      Transplant from 1206 inserts

      Transplant from 36mm Jiffy Pellets

      Cucumbers

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts

      Transplant from 4" press fit or round pots

      Transplant from 42mm Jiffy Pellets

      Eggplant

      Transplant from 50 cell plug sheets/trays

      Transplant from 804 inserts

      Transplant from 4" press fit or round pots

      Transplant from 42mm Jiffy Pellets

      Fennel

      Transplant from 72, 98 plug trays

      Transplant from 1206 inserts

      Transplant from 4" press fit, 4" round pots

      Transplant from 42mm Jiffy Pellets

      Gourds

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts.

      Transplant from 4" press fit or round pots.

      Transplant from 42mm Jiffy Pellets

      Greens (including Asian)

      Transplant from 50, 72, 98, 128 cell plug trays

      Transplant from 804, 1204, 1206 inserts

      Transplant from 36mm Jiffy Pellets

      Ground/Husk Cherry

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts

      Transplant from 4" press fit or round pots

      Transplant from 42mm Jiffy Pellets

      Kale

      Transplant from 50, 72, 98, 128 cell plug sheets/trays

      Transplant from 804, 1204, 1206, 1803 inserts

      Transplant from 42mm Jiffy Pellets

      Kohlrabi Direct seed preferred
      Leeks

      Transplant from 200, 288, 392, 406, 512 plug trays

      Lettuce

      Transplant from 72, 98 cell plug sheets/trays

      Transplant from 1206 inserts.

      Transplant from 30mm or 36mm Jiffy Pellets.

      Melons

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts

      Transplant from 4" press fit or round pots.

      Transplant from 42mm Jiffy Pellets

      Okra

      Transplant from 50, 72, 72 star cell plug sheets/trays

      Transplant from 804, 1206 inserts

      Transplant from 4" press fit, 4" round pots

      Transplant from 42mm Jiffy Pellets

      Onions Transplant from 200, 288, 392, 406, 512 plug trays
      Parsnips Direct seed into soil
      Peas Direct seed into soil
      Peppers

      Transplant from 50, 72, 72 star cell plug sheets/trays

      Transplant from 804, 1206 inserts

      Transplant from 4" press fit, 4" round pots

      Transplant from 42mm Jiffy Pellets

      Potatoes Cut seed potatoes into pieces with at least one eye each, let heal at room temp for 2 days, transplant directly into soil
      Pumpkins

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts

      Transplant from 4" press fit or round pots

      Transplant from 42mm Jiffy Pellets

      Radishes Direct seed into soil
      Rutabagas Direct seed into soil
      Shallots (from seed) Transplant from 200, 288, 392, 406, 512 plug trays
      Spinach Direct seed into soil
      Squash (Summer and Winter)

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts

      Transplant from 4" press fit or round pots

      Sweet Potatoes Plant slips directly into soil
      Swiss Chard

      Transplant from 50, 72, 72 star cell plug sheets/trays

      Transplant from 804, 1206 inserts

      Transplant from 4" press fit, 4" round pots

      Transplant from 42mm Jiffy Pellets

      Tomatillos

      Transplant from 50 deep, 72 star plug trays

      Transplant from deep jumbo 606, deep jumbo 806 inserts

      Transplant from 3" deep, 4" press fit, 4" round deep pots

      Tomatoes

      Transplant from 50 deep, 72 star plug trays

      Transplant from deep jumbo 606, deep jumbo 806 inserts

      Transplant from 3" deep, 4" press fit, 4" round deep pots

      Turnips Direct seed into soil
      Watermelons

      Transplant from 50 cell plug sheets/trays

      Transplant from 804, Deep Jumbo 806 inserts.

      Transplant from 4" press fit or round pots.

      Flowers
      From Seed (most flowers)

      Transplant from 38, 50, 72, 98, 128, 162, 200 plug sheets/trays

      Transplant from 804, 1204, 1801 inserts

      Transplant from 4", 4.5" press fit pots

      Transplant from 42mm Jiffy Pellets

      African Violets

      4", 4.5", 5" round pots

      4.5" square press fit pots

      Geraniums

      Start in any size plug tray, direct transplant or move to 4.5" press fit for sale

      Mums

      Start cuttings in any size plug tray, move up to round pots.  Transplant into garden or mum pans for sale

      Succulents

      Almost any pot we offer, but try 2" TEKU pots, 3" squat pots for small plants.

      Size container so it is only slightly bigger than the current plug size.  Shallow pots are usually better for succulents.  Use well drained potting soil, amended with our Breeze blend coir.

      Other Houseplants Most houseplants are traditionally planted into round containers.  Move up to next size as roots begin to wind around pot.
      Herbs
      Basil

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Catnip

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Chives

      Direct seed preferred

      Start in 4.5" or 5" round pots for sale or kitchen cuttings

      Cilantro / Coriander

      Stick cuttings in 50, 72, 98, 128, 162, 200 cell plug trays

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Dill

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" press fit pots, or 4" round pots

      Lemon Balm

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4" round pots

      Lemon Grass

      Use 50 cell deep, 72 star cell plug trays

      Use 3" deep, 4" round deep, 4" press fit pots

      Mint

      Stick cuttings in 50, 72, 98, 128, 162, 200 cell plug trays

      Stick cuttings in 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Oregano

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Parsley

      Start in 50, 72, 98, 128, 162, 200 cell plug trays

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Rosemary

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Sage

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Savory

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4", 4.5", 5" round pots

      Thyme

      Start in any size plug tray

      Start in 804, 1206, 1803 inserts

      Transplant directly into soil, or transplant into 4" or 4.5" press fit pots, or 4" round pots

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