What to Plant in March in Zone 3

Start indoors in March

Seeds to start under lights or on a sunny sill this month. Dates are the indoor-start window for zone 3.

Vegetables & herbs

• Celeriac (Celery Root)Mar 21–Mar 28
• CeleryMar 21–Mar 28
• LeekMar 21–Mar 28

Peppers

• 7 Pot Douglah Pepper (Chocolate 7 Pot)Mar 14–Mar 21
• 7 Pot Primo PepperMar 14–Mar 21
• Aji Amarillo PepperMar 21–Mar 28
• Carolina Reaper PepperMar 14–Mar 21
• Datil PepperMar 21–Mar 28
• Dorset Naga PepperMar 14–Mar 21
• Ghost Pepper (Bhut Jolokia)Mar 14–Mar 21
• Habanero PepperMar 21–Mar 28
• Komodo Dragon PepperMar 14–Mar 21
• Lemon Drop PepperMar 21–Mar 28
• Naga Viper PepperMar 14–Mar 21
• Rocoto PepperMar 7–Mar 14
• Scotch Bonnet PepperMar 21–Mar 28
• Superhot Pepper (Ghost, Reaper, Scorpion)Mar 14–Mar 21
• Tabasco PepperMar 21–Mar 28
• Trinidad Moruga Scorpion PepperMar 14–Mar 21
• Trinidad Scorpion Butch T PepperMar 14–Mar 21

Flowers

• Annual Geranium (Pelargonium)Mar 28–Apr 4
• ColeusMar 21–Mar 28
• ColumbineMar 28–Apr 4
• Dusty MillerMar 28–Apr 4
• EucalyptusMar 28–Apr 4
• ImpatiensMar 21–Mar 28
• Johnny Jump UpMar 21–Mar 28
• LobeliaMar 28–Apr 4
• Pansy / ViolaMar 7–Mar 14
• PetuniaMar 28–Apr 4
• Purple ConeflowerMar 28–Apr 4
• SnapdragonMar 28–Apr 4
• Torenia (Wishbone Flower)Mar 21–Mar 28
• Vinca (Madagascar Periwinkle)Mar 21–Mar 28
• Wax BegoniaMar 7–Mar 14
• YarrowMar 28–Apr 4

Still time to start indoors

The usual indoor-start date for these has passed, but planting-out hasn't come yet. Seed started now still makes a transplant, just a smaller one. Buying starts is the easy alternative. Dates are when they go outside.

• Eryngium (Sea Holly)Plant outJun 6–Jun 13
• LisianthusPlant outJun 6–Jun 13