HALLAWELL’S 
36 
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Seasons to Sow Flower Seeds in Central California 
This list enables one to tell at a glance when the various flower seeds may be sown. As some perennials will bloom 
the same season if sown early in the year, we have stated the latest time in spring that they may be sown for this pur¬ 
pose. Several varieties of hardy annuals if sown in the fall will come into bloom earlier than if sown in the spring, even 
if the plants do not make much progress during the cold weather. Tender and half hardy annuals, if sown early, should 
be started in a warm, sheltered position and transplanted when the cold weather is over. 
HA—Hardy Annual. TP—Tender Perennial. HHP—Half Hardy Perennial. 
HP—Hardy Perennial. HHA—Half Hardy Annual. TA—Tender Annual. 
HB—Hardy Biennial. 
Abronia HP . 
Achimenes TP . 
Acroclinium HA . 
Agathea HP . 
Ageratum HHA. 
Agrostemma HP. 
Alyssum HA. 
Alonsoa HHA . 
Amaranthus TA. 
Anagallis HA . 
Ancliusa HP . 
Anchusa HA . 
Anemone HP . 
Arabis HP . 
Arctotis HA . 
Asparagus . 
Aubrietia HP . 
Australian Pea Vine HHP 
Aster HHA . 
Aster Perennial HP. 
August to March 
Feb. to April, June to Aug. 
September to June 
May to September 
February to May 
June to March 
All year round 
February to May 
February to May 
September to June 
May to September 
August to March 
March to July 
May to September 
September to May 
January to May 
May to September 
May to September 
February to June 
May to September 
Balloon Vine TA.March 15 to May 
Balsam TA .February to June 
Bartonia HA.September to May 
Begonia .Jan. to March, June to Aug. 
Brachycome HA .February to June 
Browallia HA.• •.February to June 
Calceolaria.June to September 
Calendula HA.All year round 
Calliopsis HA .February to June 
Campanula HP .May to September 
Canterbury Bells HB .April 15 to August 15 
Canterbury Bells, Annual.September to February 
Canary Bird Flower TA.March 15 to June 
Candytuft HA .All year round 
Candytuft, HP.May to September 
Canna HP ...February to June 
Cardinal Climber TA .April and May 
Carnation HP .August to March 
Castor Bean HHP .March to June 
Celosia (Cockscomb) TA .February to May 
Centaurea Sweet Sultan HA.September to March 
Cerastium HP .May to September 
Cheiranthus HB .August to March 
Chrysanthemum HA .February to June 
Chelone HP .May to September 
Cineraria HHP .May to Oct., Dec. to Mar. 
Clarkia HA .September to June 
Cleome TA .March 15 to May 
Cobaea HP .August to March 
Coleus TP .March to May 
Collinsia HA....September to May 
Columbine HP .April to September 
Coreopsis HP.August to March 
Cornflower or Bachelor’s Button HA September to May 
Cosmos HHA .February to June 
Cyclamen TP .August to March 
Cynoglossum HB.June to March 
Cypress Vine TA....March 15 to May 
Dahlia HHP.January to March 
Daisy HP....August to March 
Daisy, Shasta HP.May to September 
Delphinium HP.June to November 
Dianthus (Pinks) HA.September to May 
Dianthus HP .May to September 
Diascia HP .August to March 
Didiscus HHA .February to June 
Dimorphotheca HHA.February to June 
Dolichos, Hyacinth Bean TA.March to May 
Eschscholtzia (Calif. Poppy) HA. ... September to May 
Euphorbia TA .February to May 
Exacum TA.Mar. & April, Aug. to Sept. 
Forget-Me-Not HP .June to November 
Four O’clock HA .February to April 
Foxglove (Digitalis) HP.May to September 
Freesia HP .February to August 
Gaillardia HHA. 
Gaillardia HP. 
Gerbera HHP . 
Gesneria TP . 
Geum HP. 
Gilia HA. 
Gloxinia . 
Godetia HA . 
Gomphrena HHA . 
Gourds TA . 
Gypsophila Elegans HA . 
Gypsophila Paniculata HP 
February to May 
June to March 
March to September 
Jan. to Mar., June to Aug. 
June to March 
September to June 
Jan. to Mar., June to Aug. 
September to June 
February to May 
April and May 
October to July 
May to September 
Helichrysum HA. 
Heliopsis HP . 
Heliotrope HHP . 
Heuchera HP. 
Hibiscus HP.. 
Hollyhock HP . 
Honesty HP . 
Humulus (Japonicus) HHA 
Hunnemannia TA. 
February to May 
May to September 
August to March 
May to September 
May to September 
May to September 
May to September 
March to May 
April to June 
Impatiens TP.March to June 
Ipomoea (Moonflower) HHA.March 15 to May 
Kenilworth Ivy HP.May to September 
Kochia HA .February to May 
Larkspur HA . 
Lathyrus HP . 
Lavatera Splendens HA 
Lavender HP . 
Leptosyne HHA .. 
Linaria Maroccana HA , 
Linum Scarlet Flax HA 
Lobelia HHA . 
Lupin HA . 
Lupin HP . 
Lychnis HP . 
Lythrum HP . 
September to April 
May to October 
March to May 
May to September 
February to June 
September to July 
February to June 
November to May 
September to May 
June to March 
May to September 
May to September 
Marigold HHA. 
Mathiola HA . 
Matricaria HP . 
Maurandia HHP. 
Meconopsis HP . 
Mignonette HA . 
Mimosa (Sensitive Plant) 
Mimulus HHP. 
Mina Lobata HHA . 
Momordica HHA. 
Morning Glory HHA 
February to May 
September to May 
September to March 
September to March 
March to September 
All year round 
February to May 
September to March 
March 15 to May 
March 15 to May 
March 15 to May 
Nasturtium TA .March 15 to June 
Nemesia HHA .Feb. to June, Aug. & Sept. 
Nemophila HA.September to March 
Nicotiana HHA .February to May 
Nigella HA .September to May 
Pansy, for spring blooming HA .... July to October 
Pansy, for summer and late 
blooming HA .February to May 
Pentstemon HP.July to March 
Petunia TP.January to May 
Phacelia HA.September to June 
Phlox HA ..September to May 
Physalis TA .February and March 
Physostegia HP .May to September 
Platycodon HP .May to September 
Poppy. Annual.September to June 
Poppy, Iceland HP.August to March 
Poppy, Oriental HP.May to September 
Portulaca HA.April to June 
