Darwin Perennials 2026 Catalog

CROP SCHEDULE & USES 1-QT. (10-CM) POT, 1 PLANT PER POT

PLANT GROWTH REGULATORS PGRs generally not needed

PINCHING AFTER TRANSPLANT

PESTS AND FUNGAL DISEASES

2 TO 3-GAL. (25 TO 30-CM) POT, 3 PLANTS PER POT

USDA HARDINESS ZONES

1-GAL. (15-CM) POT, 1 PLANT PER POT

BLOOM MONTHS March to September

HEIGHT

Yes

White fly, thrips

Rooted: 6-8 wks

Rooted: 8-10 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

7-9

PGRs generally not needed

White fly, spider mites Unrooted: 12-14 wks Rooted: 8-10 wks

Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

16-18 in. (41-46 cm)

7-10

March to September

Once for smaller pot sizes, twice for larger containers.

Yes

PGRs generally not needed

Thrips

Not recommended Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

24 in. (61 cm)

6-11

March to September

Yes

PGRs generally not needed

White fly, spider mites, botrytis

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 17-19 wks Rooted: 12-14 wks

20-22 in. (51-56 cm)

4-9

March to September

Yes

PGRs generally not needed

White fly, spider mites, botrytis

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 17-19 wks Rooted: 12-14 wks

22-24 in. (56-61 cm)

4-9

March to September

Spider mites

Not recommended 10-12 wks

12-14 wks

14-16 in. (36-41 cm)

4-9

March to September

Typically not required

Will respond to 300 ppm Configure spray at young plant level

Yes

PGRs generally not needed

Unrooted: 13-15 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

Unrooted: 17-19 wks Rooted: 12-14 wks

21-24 in. (53-61 cm)

5-9

April to May

Spider mites, thrips, bacterial spot, botrytis

4-6 in. (10-15 cm)

4-9

March to June

No

B-Nine/Cycocel combination at 3,750 ppm, B-Nine/ Cycocel 500 ppm before flowering. Sumagic spray can be used with caution after flowering if needed.

Not recommended Rooted: 10-12 wks Rooted: 10-12 wks

12-14 in. (30-36 cm)

5-9

March to September

Typically not required

PGRs generally not needed

Very disease resistant. Watch for root and crown rot under poor growing conditions. Generally pest and disease free.

PGRs generally not needed

Unrooted: 10-12 wks Rooted: 6 wks

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 2-4 in.

3-9

September to October

One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant. One pinch, two to three weeks after transplant.

(5-10 cm)

Generally pest and disease free.

Unrooted: 10-12 wks Rooted: 6 wks

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 7-10 in.

5-9

July to August

PGRs generally not needed. B-Nine is effective if needed, especially under lower light conditions

(18-25 cm)

PGRs generally not needed

Generally pest and disease free.

Unrooted: 10-12 wks Rooted: 6 wks

Unrooted: 12-14 wks Rooted: 8-10 wks

Unrooted: 15-17 wks Rooted: 10-12 wks

3-6 in. (8-15 cm)

4-9

Non- flowering

PGRs generally not needed

Generally pest and disease free.

Unrooted: 10-12 wks Rooted: 6 wks

Unrooted: 12-14 wks Rooted: 8-10 wks

Not recommended 2-5 in. (5-13 cm)

5-9

July to August

Rooted: 4-6 wks

Rooted: 6-8 wks

10-12 wks

2-5 in. (5-13 cm)

4-8

June to July

Typically not required

Not particularly sensitive. Use well- drained media. Not particularly sensitive. Use well- drained media.

4-6 wks

6-8 wks

Not recommended 4-6 in.

6-9

March to October

Typically not required

B-Nine/ Cycocel sprays 2,500/1,000 ppm

(10-15 cm)

Yes

PGRs generally not needed

Aphids

Unrooted: Plant by Week 40 (North), Week 45 (South) Rooted: Stick by Week 35 (North), Week 40 (South)

Unrooted: Plant by Week 35 (North), Week 40 (South) Rooted: Stick by Week 30 (North), Week 35 (South)

Unrooted: Plant by Week 32 (North), Week 37 (South) Rooted: Stick by Week 28 (North), Week 32 (South) Unrooted: 16-18 wks Rooted: 12-14 wks

10-12 in. (25-30 cm)

4-9

March to April

Yes

PGRs generally not needed

Aphids, white fly

Not recommended Unrooted: 14-16 wks Rooted: 10-12 wks

14-18 in. (36-46 cm)

4-9

April to September

Yes

PGRs generally not needed

Aphids, white fly

Unrooted: 10-14 wks Rooted: 8-10 wks

Unrooted: 14-16 wks Rooted: 10-12 wks

Unrooted: 16-18 wks Rooted: 12-14 wks

12-14 in. (30-36 cm)

4-9

May to October

Yes

PGRs generally not needed

Aphids, white fly

Not recommended Unrooted: Plant by Week 35 (North), Week 40 (South) Rooted: Stick by Week 30 (North), Week 35 (South)

Unrooted: Plant by Week 32 (North), Week 37 (South) Rooted: Stick by Week 28 (North), Week 32 (South) Unrooted: 13-15 wks Rooted: 8-10 wks

16-20 in. (41-51 cm)

5-8

June to August

Unrooted: 11-13 wks Rooted: 6-8 wks

Unrooted: 13-15 wks Rooted: 8-10 wks

8-10 in. (20-25 cm)

4-9

February to October

Recommended PGRs generally not needed

Watch for thielaviopsis, pythium, white fly, spider mites.

FINISHING GUIDE | 157

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